Question

All living organisms must maintain homeostasis in order to survive. Which statement best describes one way humans maintain homeostasis?


Temperature is regulated by giving off carbon dioxide.


Water content is regulated by giving off carbon dioxide.


Temperature is regulated by sweating.


Water content is regulated by sweating.

Question at position 4
4

Multiple Choice
1 point



Question at position 4

Which statement best describes a function of the proteins embedded in the plasma membrane of cells?


They provide instructions for the processes in the cell.


They selectively allow certain particles into and out of the cell.


They attract charges in the cell’s environment to give the cell a net charge.


They store the energy required by the rest of the membrane to perform its functions.

Question at position 5
5

Multiple Choice
1 point



Question at position 5

Use the diagram below to answer the question



Screenshot (147).png



Which cell process is best modeled by the diagram?


osmosis


exocytosis


passive transport


facilitated diffusion

Question at position 6
6

Multiple Choice
1 point



Question at position 6

Use the diagram below to answer the question



Screenshot (191).png



The indicated protein is part of a cell membrane. What is the most likely purpose of this protein?


It allows passage of particles into and out of the cell.


It manufactures phospholipids to repair membrane damage.


It releases stored chemical energy in membrane carbohydrates.


It attracts unbalanced electrical charges in the cell’s environment.

Question at position 7
7

Multiple Choice
1 point



Question at position 7

Which component of this membrane contains a hydrophobic region and acts as the primary barrier to most foreign substances?



Screenshot (211).png








protein


cholesterol


carbohydrate chain


phospholipid bilayer

Question at position 8
8

Multiple Choice
1 point



Question at position 8

A New Type of Treatment



Some human diseases involve the unregulated growth of cells. Although some patients are not affected by these growths, many are harmed. Cells in harmful growths divide uncontrollably and can eventually invade other cells, tissues, and organs of the body.


Some patients carry a mutation on one or more growth-suppressor genes (GSGs). GSGs help to repair damage to DNA. This mutation decreases the individual’s ability to fight these harmful growths. Recently, researchers reported on the results of using a combination of two types of medicine to treat patients with unregulated growths caused by a lack of functioning GSGs.



Screenshot (219).png



When medicine X and medicine Y are used together, they cause the cell processes in the targeted cells to fail.



Given the properties of the medicine Y molecule, which mechanism is most likely responsible for medicine Y’s entry into cells?


osmosis


exocytosis


active transport


simple diffusion

Question at position 9
9

Multiple Choice
1 point



Question at position 9

Which statement best describes the role of the Golgi apparatus within the cell?


It is the site where glucose is oxidized to produce energy


It is the site where lipids and proteins are translated and folded


It is the site where DNA and RNA are stored, maintained, and controlled


It is the site where proteins are sorted, packaged, processed, and modified

Question at position 10
10

Multiple Choice
1 point



Question at position 10

A jackrabbit has large ears containing blood vessels that help it maintain a constant body temperature by adjusting heat exchange with the surrounding environment.

Which characteristic of life is best described by this example?


growth


energy use


organization


homeostasis

Question at position 11
11

Multiple Choice
1 point



Question at position 11

Which transport mechanisms require the formation of a vesicle to transport material into or out of a cell?


diffusion and osmosis


exocytosis and endocytosis


exocytosis and calcium pumps


diffusion and facilitated diffusion

Question at position 12
12

Multiple Choice
1 point



Question at position 12

Which statement best describes how channel and carrier proteins in the plasma membrane are similar?


Both allow for the flow of molecules into and out of a cell.


Both directly connect the membrane to the nucleus of a cell.


Both use energy to continuously move water molecules out of a cell.


Both cause the phospholipid bilayer to form a rigid membrane for a cell.

Answer 1

Here are the best answers to your questions:

**Question 1: Which statement best describes one way humans maintain homeostasis?**
- **Temperature is regulated by sweating.**

**Question 2: Which statement best describes a function of the proteins embedded in the plasma membrane of cells?**
- **They selectively allow certain particles into and out of the cell.**

**Question 3: Which cell process is best modeled by the diagram?**
- This question requires the actual diagram to answer accurately. However, if it is illustrating the movement of water across a semi-permeable membrane, the answer could be **osmosis**. If it shows transport involving proteins, it might be **facilitated diffusion**.

**Question 4: The indicated protein is part of a cell membrane. What is the most likely purpose of this protein?**
- **It allows passage of particles into and out of the cell.**

**Question 5: Which component of this membrane contains a hydrophobic region and acts as the primary barrier to most foreign substances?**
- **phospholipid bilayer**

**Question 6: Given the properties of the medicine Y molecule, which mechanism is most likely responsible for medicine Y’s entry into cells?**
- **simple diffusion**

**Question 7: Which statement best describes the role of the Golgi apparatus within the cell?**
- **It is the site where proteins are sorted, packaged, processed, and modified.**

**Question 8: A jackrabbit has large ears containing blood vessels that help it maintain a constant body temperature by adjusting heat exchange with the surrounding environment. Which characteristic of life is best described by this example?**
- **homeostasis**

**Question 9: Which transport mechanisms require the formation of a vesicle to transport material into or out of a cell?**
- **exocytosis and endocytosis**

**Question 10: Which statement best describes how channel and carrier proteins in the plasma membrane are similar?**
- **Both allow for the flow of molecules into and out of a cell.**

Please review the diagrams and additional context for questions 3 and 6, as they require visual information for precise answers.