Question

1. match the following terms with their description: passive transport, diffusion, concentration gradient, and osmosis.

a. diffusion of water across a selectively permeable membrane:
b. movement across a cell membrane that requires no work from the cell:
c. movement of a substance from high to low concentration:
d. when there exists a difference in the amount of a substance across a distance:

Explanation:

• For part a: Osmosis is defined as the diffusion of water across a selectively permeable membrane.
• For part b: Passive transport is the movement across a cell membrane that does not require the cell to expend energy (no work from the cell).
• For part c: Diffusion is the movement of a substance from an area of high concentration to an area of low concentration.
• For part d: Concentration gradient is the difference in the amount (concentration) of a substance across a distance.

Answer:

a. osmosis
b. passive transport
c. diffusion
d. concentration gradient