Lab 2: Osmosis and Diffusion Test Questions and Answers Rated A

Lab 2: Osmosis and Diffusion Test Questions and Answers Rated A

1. Diffusion A spontaneous process by which molecules move from a
region of their greater concentration to a region of their
lower concentration

2. Kinetic energy Energy of motion

3. What are the two factors that af- Molecular size and electrical charge
fect diffusion?

4. True or false: Polar molecules re- True
quire specific protein channels or
carriers to facilitate their diffusion

5. Aquaporins Special protein channels that water molecules can pass
through

6. Osmosis Movement of water through a selectively permeable
membrane from a region of low solute concentration to-
ward a region of higher solute concentration

7. What needs to be met in order for 1. Imbalance in the concentration of solutes on either side
osmosis to occur? of the membrane
2. Plasma membrane must be impermeable to the solutes

8. Tonicity The relative percentage of solutes in a solution and how
cells respond

9. Isotonic Equal percentage of solutes in the ECF and the ICF

10. Hypotonic Lower percentage of solutes in the ECF than in the ICF;
cells will swell/lysis

11. Hypertonic Higher percentage of solutes in the ECF than in the ICF;
cells will shrink/crenate
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