ap biology homeostasis worksheet

AP® Biology

Homeostasis: ap® biology crash course review.

One of the major topics on the AP® Bio exam is homeostasis . Most of the topics that you study in AP® Biology will force you to think: how does this relate to homeostasis? It is essential that you understand homeostasis completely and are able to relate it to a variety of topics. In this AP® Biology Crash Course Review we will summarize what homeostasis is, the many different levels where it is important that homeostasis is maintained, and finally a free response question that you could see on your AP® Biology exam .

Homeostasis is the state in which a system is functioning at an optimal level. It is essential to individual and group survival that homeostasis is maintained and kept relatively constant.

When outside influences disrupt homeostasis, feedback loops return the variables back to normal levels. Try and imagine an organism as a building with a thermostat. If you set the thermostat to 70 degrees and someone opens a window to the warm outdoors, the building will warm up, causing the thermostat to turn on and cool the building down. If someone opens up the freezer at that point, cooling down the building, the thermostat will turn off the air conditioning. Maintaining homeostasis in organisms is not all that different from maintaining temperatures in a building.

For living systems, homeostasis can occur at different levels. In this AP® Biology Crash Course Review of homeostasis, we will examine case studies of homeostasis at each level.

Homeostasis at the Organismal Level

Thermoregulation.

The analogy that we just set up in the introduction of this AP® Biology Review article is especially useful when thinking about thermoregulation . Body temperature works similarly to a thermostat by keeping the temperature constant in warm blooded species.

If the body is exposed to high heat, it will begin to sweat. Sweating is a mechanism that organisms use to thermoregulate; when an organism sweats, liquid is released from the body and onto the skin. The liquid perspiration is then able to evaporate from the skin. The process of evaporation releases energy into the environment, cooling the skin down.

When the opposite happens, and an organism is too cold, the body will react by shivering. Shivering causes the energy levels to rise, raising the internal body temperature.

It is important for an organism to remain at homeostasis. Straying too far from this ideal temperature can result in sickness or death.

Glucose Regulation

Blood sugar is another homeostatic parameter. The outside influence in this case is food; digestion increases glucose levels.

The hormone, insulin, lowers blood sugar, while glucagon prevents it from dropping too much. After eating, the pancreas reacts accordingly and produces the appropriate hormone to regulate blood sugar levels.

Diabetes is a disease that occurs when there is no natural production of insulin. Patients must inject themselves with the hormone in order to stay within the healthy blood sugar range.

Osmotic Regulation

Osmotic regulation relates to how the body keeps water and salts in a homeostasis. When blood has a high sodium concentration, it stimulates the hormone system to release vasopressin, a hormone that tells your kidneys to retain water. This, in turn, concentrates the urine and does not allow the organism to excrete as much water. When water is retained, it will decrease the concentration of sodium by solubilizing it.

Carbon Dioxide Regulation

Muscles excrete carbon dioxide during exercise, thus increasing its levels in your blood. The carotid arteries’ receptors sense the changed environment and signal the brain to stimulate the lungs to increase respiration.

These are the processes that cause you to breathe more quickly and heavily as you exercise. Because you start increasing the rate of oxygen in your body, the concentration of carbon dioxide decreases.

Homeostasis at the Cellular Level

Cell reproduction is a popular topic on AP® Biology exam. The reason that cells reproduce so efficiently and often is due to their need to restore and keep homeostasis.

Cells in different parts of your body vary in lifespans. Regardless, dead cells need to be replaced for the organ and individual to function properly. Neighboring cells reproduce themselves in order to fill the void left by dead cells. Cells usually stop replicating when the intercellular space runs out.

Individually, cells contain their own homeostatic variables. Within the membrane , there are various pumping mechanisms that supply nutrients to the cell. When enough material is present, the pumping ceases; proton pumping mechanisms of membranes during respiration and photosynthesis are good examples of homeostasis at the cellular level.

Homeostasis at the Molecular Level

At a molecular level, organic molecule production must be limited for efficiency and prevention of harm. This homeostasis can be achieved by an enzyme used to stop the chemical processes. In glycolysis, ATP formed from glucose reacts with the enzyme that helped make it in order to prevent its own overproduction.

In the same fashion, essential amino acids regulate their own production. Isoleucine production is also inhibited by an enzyme that helped create it, theroninedeaminase.

Homeostasis at the Population Level

Homeostasis of an ecosystem depends greatly on a balanced population of different species.

The most obvious way populations are regulated is seen in the food chain. Predator and prey populations are affected by the supply of each other. There is an ideal range for both so that neither goes extinct.

Conversely, animals with symbiotic relationships sustain each other’s populations in a positive feedback loop . This means that increases in each factor perpetuates each other’s increase.

These animals develop adaptations that support each other’s survival. Co-evolution allows these populations counter death factors, like predators, and maintain homeostatic levels.

Free Response Questions

Now that we have a better understanding of homeostasis as part of this AP® Biology Review, let’s review a question that was on the 2004 AP® Biology exam.

Homeostasis, maintaining a steady-state internal environment, is characteristic of all living organisms. Choose three of the following physiological parameters and, for each, describe how homeostasis is maintained.

We have reviewed blood-glucose levels, body temperature, and osmotic homeostasis in the sections above. This question wants you to be specific and choose one organism; in this case, you could use humans. Here is an example of a free response for this question:

Homeostasis is maintained through a variety of mechanisms in all organisms. Humans maintain homeostasis of body temperature through two means: sweating and shivering. When the human body is too warm, the organism will sweat. The evaporation of the perspiration will cause the individual to lose energy on the skin, cooling it down. Humans also shiver when their bodies are too cold. Shivering causes energy to be expelled in the body, raising the temperature.

Humans also regulate blood-glucose levels through the pancreas organ. When humans eat food and blood glucose levels increase, insulin prevents it from increasing too drastically. When a human being is starving, a lack of blood glucose will cause glucagon to start to break down fat storage. Lastly, humans also have homeostasis in osmotic regulation. If human blood has too much salt in it, the kidneys will cause water retention to occur. The water retention will cause water to be added to the blood and the salt, lowering the salt concentration in the blood.

This is one answer that would be accepted by the AP® Biology exam on the topic of homeostasis! In this AP® Biology Crash Course Review we have defined homeostasis, reviewed examples of homeostasis, and finished up with a free response question . How else have you been studying homeostasis as part of your AP® Biology Review? What other examples have you found? Let us know in the comments section!

If you’re looking for more information about regulation, be sure to check out our article Negative Feedback: AP® Biology Crash Course Review

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Scientific Worksheets

Homeostasis worksheet

This page contains a homeostasis worksheet that will comprehensively discuss the biological process of homeostasis and the roles of homeostasis in living organisms.

What is a homeostasis worksheet?

The homeostasis worksheet is a scientific document that contains a clear discussion about the process of homeostasis and its roles in the normal functioning of living organisms.

How will a homeostasis worksheet help?

The homeostasis worksheet will help medical and biochemistry students fully understand how the process of homeostasis occurs and its roles in ensuring the cells in living organisms perform in a normal way.

Instructions on using the homeostasis worksheet.

This worksheet contains sections that describe the process of homeostasis and how it controls the functioning of the cell.

The worksheet will explain the importance of the process of homeostasis to the normal functioning of living organisms.

Conclusion.

The page has discussed the process of homeostasis and its advantages to the normal functioning of cells of the living organism.

We hope the page was of great help to you.

If you have any questions or comments please let us know.

The images used in this worksheet were derived from the following sites:

https://www.khanacademy.org/science/ap-biology/cell-communication-and-cell-cycle/feedback/a/homeostasis

Homeostasis is the state of internal balance in an organism or group of organisms.

Homeostasis may also refer to the regulation and maintenance of a normal operating temperature, blood pH, etc. while maintaining life.

These can be explained as the temperature of an athlete’s body dropping from its usual moderate level to the freezing point; if left unattended, it would cause death.

However, when a person sweats, for example, it raises their body temperature back up to a healthy level.

A homeostasis is a form of feedback, an automatic process that regulates the internal environment of living things by adjusting the same in response to changes.

It is a property that distinguishes living from non-living systems since non-living systems display no such tendency toward internal equilibrium.

It was first described by French physiologist Claude Bernard as the tendency of biological systems to maintain stable states.

In cybernetics, a type of homeostasis called negative feedback is used for control purposes.

The term “homeostasis” comes from the Greek words (“hómoios”) (ὁμοιος), meaning “similar”, and (“stásis”), meaning “standing still” and was coined by Belgian physiologist François Jacob in the 1940s.

Types of homeostasis feedback mechanism.

There are 2 main feedback mechanisms in the process of homeostasis.

Positive feedback.

The positive feedback of homeostasis is a process in which the regulation of an organism occurs without deliberate action, but with a result that is partially opposite to that desired.

The positive feedback loop of homeostasis is the idea that if something is happening in your body, then there’s a corresponding change in the body that causes it to happen.

During the process of giving birth, the head of the baby pushes towards the cervix.

The walls of the uterus and cervix need to contract and relax for the baby to push out of the womb.

This sends the necessary signal to the brain which in return stimulates the pituitary gland to release the oxytocin hormone.

The oxytocin hormone is a birth hormone that is necessary for the contraction and relaxation of the uterine wall.

Because this process should be continuous until the delivery of the baby is over, the pituitary keeps producing more and more oxytocin hormone.

So instead of controlling the release of oxytocin, the body keeps on producing more and more until giving birth is over.

This process of the body increasing the release of substance instead of regulating it to the equilibrium levels is called positive feedback.

Negative feedback on homeostasis.

The negative feedback of homeostasis is the control of the body’s internal environment or “milieu”.

The hypothalamus, located deep in the brain, is constantly monitoring and adjusting many variable factors to maintain a healthy balance.

When any variable becomes too extreme, the hypothalamus will secrete hormones to raise or lower that variable back to homeostasis.

The negative feedback of homeostasis is related to how a human being survives all day: their brain monitors and compensates for changes in temperature, activity levels, etc. to keep the body at a constant temperature and to fight off disease.

When a human body cannot maintain homeostasis, it will initiate negative feedback mechanisms to counteract this problem. Blood sugar levels are regulated through a complex network of internal variables in the body, including insulin and glucagon levels, which will trigger metabolic changes when blood sugar is too low or high. If the sugar level becomes too low, glucose is released into circulation by the liver, which can further raise blood sugar levels when needed.

The body must work to maintain normal blood glucose.

When the blood sugar rises, the beta cells of the pancreas produce insulin hormone. The hormone triggers increased metabolic activities such as respiration which use excess glucose.

Insulin also converts glucose into glycogen, which is stored in the liver.

Those two activities decrease the level of glucose in the blood and take the blood sugar levels back to normal.

In the event the blood sugar levels are low, the alpha cells of the pancreas produce glucagon hormone. The hormone has activities that are directly opposite to those of insulin.

The glucagon hormone converts the glycogen in the liver, which had been made by the insulin hormone, into glucose. The levels of glucose in the blood eventually rise and get back to the normal blood concentration.

Homeostasis worksheet-Answer key.

1.) Define the term homeostasis.

2.) Name the two conditions in the body that can be regulated by homeostasis.

Blood sugars.

Temperature.

3.) Name the two types of feedback loops of homeostasis.

Positive feedback loop.

Negative feedback loop.

4.) Describe the negative feedback loop of homeostasis.

For instance:

5.) Describe the negative loop of homeostasis.

You can download this worksheet here.

Homeostasis Worksheet Ch5 BI

Section 5-1 Passive Transport

1. What is the purpose of the cell membrane?

2. Explain passive transport.

3. What is the simplest type of passive transport?

4. In which direction does diffusion occur?

5. What is a concentration gradient?

6. Sugar dissolving in water is an example of _______________________.

7. What supplies the energy for diffusion?

8. Molecules are constantly _____________________.

9. What is meant by equilibrium?

10. Do molecules stop moving when equilibrium is reached? Explain.

11. List three things that determine if a molecule will be able to diffuse across a membrane.

12. Name the 2 parts of a solution.

13. Define osmosis. Is it passive or active transport?

14. The direction water moves across a cell membrane depends on the concentration of what on either side of the cell membrane?

15. Explain what is true about solutes if the outside of the cell is hypotonic to the cytosol? Which way does water move?

16. Explain the solute conditions if the outside is hypertonic to the cytosol. Which way does water move?

17. What occurs if the solute concentration on each side of the cell membrane is isotonic?

18. If the inside & outside of a cell are both isotonic, does water still move across the cell membrane? Explain.

19. If the inside of the cell is hypotonic, the outside will be _________________________.

20. Water tends to diffuse from ____________________ to ___________________ solutions.

21. How does a unicellular paramecium get rid of its excess water? Is energy used?

22. Many cells in multicellular organisms have _________________ pumps to prevent them from taking in too much water in hypotonic solutions.

23. What structure around the outside of plant cells keeps hem from rupturing from too much water?

24. What is turgor pressure & how does it help plant cells?

25. What happens to plant cells placed in a hypertonic solution? Name this process.

26. What is cytolysis & what causes it?

27. Another type of passive transport is __________________________ diffusion.

28. Explain how carrier proteins help in facilitated.

29. Sketch the changes that take place in a carrier protein as it helps molecules move across the cell membrane.

30. What sugar moves across the cell membrane by facilitated diffusion?

31. What are ion channels & are they used in passive or active transport?

32. Name 4 ions that cross the cell membrane through ion channels.

33. Why can’t these ions diffuse across the lipid bilayer of the cell membrane?

34. Ion channels may be always ________________ or have ___________________.

35. Name 3 stimuli that open & close gated channels.

Section 5-2 Active Transport

36. Define active transport.

37. Why are carrier proteins in the cell membrane that are used for active transport called “pumps”?

38. What is the best-known carrier protein pump in animal cells?

39. What 2 ions move up their concentration gradient in this pump?

40. ___________________ ions are pumped out, while ______________ ions are pumped into the cell.

41. Is energy required for active transport? Explain.

42. Sodium ions are exchanged for potassium ions at a ____________ to ____________ ratio.

43. Name 2 processes used to move macromolecules & food particles across the cell membrane. Is energy required?

44. Explain how cells move large particles into the cell by endocytosis.

45. Name & describe the 2 types of endocytosis.

46. How do phagocytes protect cells?

47. What process moves large materials such as wastes & proteins out of the cell?

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Learning Objectives

In this section, you will explore the following question:

How does prokaryotic gene regulation differ from eukaryotic gene regulation?

Connection for AP ® Courses

Structure and function in biology result from the presence of genetic information and the correct expression of this information. In the chapter on DNA structure and function, we explored how genes are translated into proteins, which in turn determine the nature of the cell. But how does a cell know when to “turn on” its DNA? With few exceptions, each cell in your body contains identical genetic information. If each cell has the same exact DNA make up, how is it that a liver cell differs from a nerve or muscle cell?

As we will discover, although each cell shares the same genome and DNA sequence, each cell does not express exactly the same genes. Many factors determine when and how genes are expressed in a given cell. Even the type of chromosome a gene is located on, like whether it is a sex chromosome or not, can determine its expression pattern, as can mutations or changes in DNA sequence and other external factors. In prokaryotes, gene expression is regulated primarily at the level of transcription, when DNA is copied into RNA. However, eukaryotes have evolved regulatory mechanisms in gene expression at multiple levels. In all cases, regulation of gene expression determines the type and amount of protein produced in the cell. Errors in regulatory processes can result in many human diseases and conditions, including cancer.

Gene expression regulation occurs at different points in prokaryotes and eukaryotes. Prokaryotic organisms express their entire genome in every cell, but not necessarily all at the same time. In general, a gene is expressed only when its specific protein product is needed. Remember that each cell in an organism carries the same DNA as every other cell. Yet cells of eukaryotic organisms each express a unique subset of DNA depending on cell type. To express a protein, DNA is first transcribed into RNA, which is then translated into proteins. In prokaryotic cells, transcription and translation occur almost simultaneously. In eukaryotic cells, transcription occurs in the nucleus, separate from the translation that occurs in the cytoplasm along ribosomes attached to endoplasmic reticulum. As stated above, gene expression in prokaryotes is regulated at the level of transcription, whereas in eukaryotes, gene expression is regulated at multiple levels, including the epigenetic (DNA), transcriptional, pre- and post-transcriptional, and translational levels.

The science of epigenetics studies heritable changes in the genome that do not affect the underlying DNA gene sequences.

The content presented in this section supports the learning objectives outlined in Big Idea 3 of the AP ® Biology Curriculum Framework. The AP ® learning objectives merge essential knowledge content with one or more of the seven science practices. These objectives provide a transparent foundation for the AP ® Biology course, along with inquiry-based laboratory experiences, instructional activities, and AP ® exam questions.

For a cell to function properly, necessary proteins must be synthesized at the proper time. All cells control or regulate the synthesis of proteins from information encoded in their DNA. The process of turning on a gene to produce RNA and protein is called gene expression . Whether in a simple unicellular organism or a complex multi-cellular organism, each cell controls when and how its genes are expressed. For this to occur, there must be a mechanism to control when a gene is expressed to make RNA and protein, how much of the protein is made, and when it is time to stop making that protein because it is no longer needed.

Although genetic differences between species and between individuals within a species are often responsible for phenotypic differences, another mechanism that can create phenotypic differences is differences in gene expression. For example, although every cell in an organism contains the same genes, the bone cells in the organism appears different from the fat cells due to differences in which genes are expressed by which cell. Similarly, although mice and humans share approximately 97.5% of their genes, they are very different organisms because different genes are turned on at different times during development and in different cells. Even organisms that share 100% identity in their genomes (a.k.a clones) can eventually appear different if they express their genes differently in response to different environmental conditions, for example. Even among humans, identical twins can possess different birthmarks, wrinkles, or other features that arise during development sometimes due to differential gene expression.

The regulation of gene expression conserves energy and space. It would require a significant amount of energy for an organism to express every gene at all times, so it is more energy efficient to turn on the genes only when they are required. In addition, only expressing a subset of genes in each cell saves space because DNA must be unwound from its tightly coiled structure to transcribe and translate the DNA. Cells would have to be enormous if every protein were expressed in every cell all the time.

The control of gene expression is extremely complex. Malfunctions in this process are detrimental to the cell and can lead to the development of many diseases.

Teacher Support

Ask students what genes are present in the DNA in a muscle cell and skin cell. Ask them if the same genome is present in every cell in the body, how do the cells have different properties. For example, discuss red blood cells, which lose their nucleus during development. This video gives an overview of gene regulation in prokaryotes and eukaryotes.

Prokaryotic versus Eukaryotic Gene Expression

To understand how gene expression is regulated, we must first understand how a gene codes for a functional protein in a cell. The process occurs in both prokaryotic and eukaryotic cells, just in slightly different manners.

Prokaryotic organisms are single-celled organisms that lack a cell nucleus, and their DNA therefore floats freely in the cell cytoplasm. To synthesize a protein, the processes of transcription and translation occur almost simultaneously. When the resulting protein is no longer needed, transcription stops. As a result, the primary method to control what type of protein and how much of each protein is expressed in a prokaryotic cell is the regulation of DNA transcription. All of the subsequent steps occur automatically. When more protein is required, more transcription occurs. Therefore, in prokaryotic cells, the control of gene expression is mostly at the transcriptional level.

Eukaryotic cells, in contrast, have intracellular organelles that add to their complexity. In eukaryotic cells, the DNA is contained inside the cell’s nucleus and there it is transcribed into RNA. The newly synthesized RNA is then transported out of the nucleus into the cytoplasm, where ribosomes translate the RNA into protein. The processes of transcription and translation are physically separated by the nuclear membrane; transcription occurs only within the nucleus, and translation occurs only outside the nucleus in the cytoplasm. The regulation of gene expression can occur at all stages of the process ( Figure 16.2 ). Regulation may occur when the DNA is uncoiled and loosened from nucleosomes to bind transcription factors ( epigenetic level), when the RNA is transcribed (transcriptional level), when the RNA is processed and exported to the cytoplasm after it is transcribed ( post-transcriptional level), when the RNA is translated into protein (translational level), or after the protein has been made ( post-translational level).

Prokaryotic cells do not have a nucleus, and DNA is located in the cytoplasm. Ribosomes attach to the mRNA as it is being transcribed from DNA. Thus, transcription and translation occur simultaneously. In eukaryotic cells, the DNA is located in the nucleus, and ribosomes are located in the cytoplasm. After being transcribed, pre-mRNA is processed in the nucleus to make the mature mRNA, which is then exported to the cytoplasm where ribosomes become associated with it and translation begins.

The differences in the regulation of gene expression between prokaryotes and eukaryotes are summarized in Table 16.1 . The regulation of gene expression is discussed in detail in subsequent modules.

Evolution Connection

Evolution of gene regulation.

Prokaryotic cells can only regulate gene expression by controlling the amount of transcription. As eukaryotic cells evolved, the complexity of the control of gene expression increased. For example, with the evolution of eukaryotic cells came compartmentalization of important cellular components and cellular processes. A nuclear region that contains the DNA was formed. Transcription and translation were physically separated into two different cellular compartments. It therefore became possible to control gene expression by regulating transcription in the nucleus, and also by controlling the RNA levels and protein translation present outside the nucleus.

Some cellular processes arose from the need of the organism to defend itself. Cellular processes such as gene silencing developed to protect the cell from viral or parasitic infections. If the cell could quickly shut off gene expression for a short period of time, it would be able to survive an infection when other organisms could not. Therefore, the organism evolved a new process that helped it survive, and it was able to pass this new development to offspring.

Science Practice Connection for AP® Courses

Think about it.

How does controlling gene expression alter the overall protein level in the cell?

The question is an application of Learning Objective 3.18 and Science Practice 7.1 because students are asked to describe the connection between genes, gene expression (i.e., transcription and translation), and how the production of different proteins can result in cell specialization and differences between organisms.

The cell controls which proteins are expressed and to what level each protein is expressed in the cell. Prokaryotic cells alter the transcription rate to turn genes on or off. This method will increase or decrease protein levels in response to what is needed by the cell. Eukaryotic cells change the accessibility (through epigenetic mechanisms), transcription, or translation of a gene. This will alter the amount of RNA and the lifespan of the RNA to alter the amount of protein that exists. Eukaryotic organisms are much more complex and can manipulate protein levels by changing many stages in the process.

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Homeostasis

This worksheet will evaluate the student's understanding of Homeostasis concepts.

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COMMENTS

24.3 Homeostasis
Animal organs and organ systems constantly adjust to internal and external changes through a process called homeostasis ("steady state"). These changes might be in the level of glucose or calcium in blood or in external temperatures. Homeostasis means to maintain dynamic equilibrium in the body.
Homeostasis (article)
Homeostasis is the tendency to resist change in order to maintain a stable, relatively constant internal environment. Homeostasis typically involves negative feedback loops that counteract changes of various properties from their target values, known as set points.
Homeostasis: AP® Biology Crash Course Review
In this AP® Biology Crash Course Review we will summarize what homeostasis is, the many different levels where it is important that homeostasis is maintained, and finally a free response question that you could see on your AP® Biology exam. Homeostasis is the state in which a system is functioning at an optimal level.
AP Biology Past Exam Questions
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Homeostasis worksheet
Homeostasis is the state of internal balance in an organism or group of organisms. Homeostasis may also refer to the regulation and maintenance of a normal operating temperature, blood pH, etc. while maintaining life. 2.) Name the two conditions in the body that can be regulated by homeostasis. Blood pH. Blood sugars. Temperature. 3.)
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Homework Intro to Animal Behavior Worksheet (On Classroom, Due Monday) Homeostasis Lab Creation (On Classroom, Due Wednesday) Take notes over AP Biology Bozeman Preview Video - Make sure...
Homeostasis Worksheet Ch5 BI
Homeostasis Worksheet Ch5 BI - BIOLOGY JUNCTION Homeostasis Worksheet Ch5 BI Homeostasis & Transport Section 5-1 Passive Transport 1. What is the purpose of the cell membrane? 2. Explain passive transport. 3. What is the simplest type of passive transport? 4. In which direction does diffusion occur? 5. What is a concentration gradient? 6.
Homeostasis -thermoregulation worksheet
Live worksheets > English Homeostasis -thermoregulation Flowchart of thermoregulation - choose the correct word ID: 1929072 Language: English School subject: Biology Grade/level: 10 Age: 15-17 Main content: Thermoregulation Other contents: Homeostasis Add to my workbooks (24) Download file pdf Embed in my website or blog Add to Google Classroom
PDF Cell Size is Limited by Surface Area
AP Biology Cell Size is Limited by Surface Area (Topic 2.3) To maintain homeostasis, cells must have enough surface area to exchange materials. However, as cells grow the surface area to volume ratio changes. As a result, there is a limit to cell growth because if a cell
16.1 Regulation of Gene Expression
The content presented in this section supports the learning objectives outlined in Big Idea 3 of the AP ® Biology Curriculum Framework. The AP ® learning objectives merge essential knowledge content with one or more of the seven science practices. These objectives provide a transparent foundation for the AP ® Biology course, along with ...
PDF Supporting Students from Day One to Exam Day
Supporting Students from Day One to Exam Day - AP Central | College Board
Homeostasis Worksheets Teaching Resources
This worksheet has seven questions to give students practice with homeostasis concepts. The questions have students identify examples of homeostasis, explain how the examples demonstrate homeostasis, and draw pictures showing homeostasis. This worksheet is meant to help introduce homeostasis concepts.This resource is four pages long.
Homeostasis Worksheet + Answer key
Homeostasis . This worksheet will evaluate the student's understanding of Homeostasis concepts. Grade 10. 👇 Find the best 3D models and educational resources for your needs 👇. Biology. General Biology; AP Biology; CBSE Biology; Biology Simulations; Biology 3D Models; Biology Worksheets + Answer Keys; Chemistry. General Chemistry; CBSE ...
Homeostasis (video)
When my body senses that it's cold, homeostasis mechanisms make me shiver, draw blood away from my skin, and give me goosebumps. These make me warmer, so my core temperature isn't changed. My body uses some of the opposite tools to cool down. It directs blood to the surface to cool down, making me a bit pink.
AP Biology Archived Free-Response Questions and Scoring Guidelines
Download free-response questions from past exams along with scoring guidelines, sample responses from exam takers, and scoring distributions. Because of updates to the AP Biology course and exam design after the 2019 exam, FRQs from 2019 and earlier may not directly reflect the format of questions which will appear on the 2021 and future exams.
Biology Homeostasis Teaching Resources
A pack of four visually engaging worksheets for high school biology students studying the homeostasis topic.The worksheets encourage independent learning as the pupils can work through them following the clear instructions given.The worksheets are useful for when learning the topic, for revision and/or assessment of knowledge and understanding of …
Quiz & Worksheet
This quiz/worksheet combo will help you test your understanding of how homeostasis works and the transport methods molecules use to move. Some terms to know include membrane, metabolism and endotherm.
HOMEOSTASIS LAB ACTIVITY.pdf
Physiology, Berry HOMEOSTASIS LAB ACTIVITY Introduction: Homeostasis means maintaining a relatively constant state of the body's internal environment. The term used to describe a pattern of response to restore the body to normal stable level is termed negative feedback. When a stimulus (environment change) is met by a response that reverses (negates) the trend of the stimulus, it is negative ...