Homeostasis and Diffusion quiz C



Homeostasis and Diffusion quiz B

1. The process of diffusion requires

a. a cell membrane.

b. an aqueous solution.

c. a difference in the concentration of molecules throughout a space.

d. all of the above

2. If the molecular concentration of a substance is the same throughout a space, the substance

a. has a large concentration gradient.

b. is in equilibrium.

c. will undergo diffusion.

d. will undergo osmosis.

3. A type of transport in which water moves across a membrane and down its concentration gradient is

a. simple diffusion.

b. facilitated diffusion.

c. diffusion through ion channels.

d. Osmosis.

4. Net movement of water across a cell membrane occurs

a. from a hypotonic solution to a hypertonic solution.

b. from a hypertonic solution to a hypotonic solution.

c. from an isotonic solution to another isotonic solution.

d. through gated water channels.

5. All forms of passive transport depend on

a. energy from the cell in the form of ATP.

b. the kinetic energy of molecules.

c. ion channels.

d. carrier proteins.

6. A structure that can move excess water out of unicellular organisms is a

a. carrier protein.

b. contractile vacuole.

c. ion channel.

d. cell membrane pump.

7. Plasmolysis of a human red blood cell would occur if the cell were

a. in a isotonic solution.

b. in a hypertonic solution.

c. in a hypotonic solution.

d. None of the above

e.

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8. Which beaker contains a hypotonic solution when compared to the egg cell?

a. A

b. B

c. C

d. None

9. What will happen to the egg in beaker B if allowed to set overnight?

a. It will swell

b. It will shrink

c. It will stay the same

10. Which type of solution causes the egg to swell?

a. Hypertonic

b. Hypotonic

c. Isotonic

d. All solutions will cause the egg to shrink

11. What is the best explanation as to why the room smelled like vinegar?

a. Diffusion of vinegar molecules

b. Osmosis of vinegar molecules

c. Hypertonic vinegar molecules

d. Hypotonic vinegar molecules

12. Cells must have ways to maintain homeostasis. Which is an example of ways cells can do this?

a. Plant cells have a cell wall to keep from bursting

b. Fresh water single-celled animals constantly pump water out

c. Eggs have shells to keep them from dehydrating

d. All of the above are examples

A

C

B

75% Water

25% Solute

75% Water

25% Solute

75% Water

25% Solute

100% water and 0% solute

75% water and 25% soute

50% water and 50% solute

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