Question

1. large molecules, such as glucose, move across cell membranes through special protein channels during a. active transport. b. facilitated diffusion. c. osmosis. d. bulk transport. 23. what is the term that describes the diffusion of water through a selectively permeable membrane? 24. explain why cells are almost always hypertonic to fresh water.

Explanation:

For question 22, facilitated diffusion uses protein channels to move large - polar molecules like glucose across the cell membrane down their concentration gradient. Osmosis is the diffusion of water, active transport requires energy and moves substances against the concentration gradient, and bulk transport is for large amounts of substances. For question 23, osmosis is defined as the diffusion of water through a selectively permeable membrane. For question 24, cells have more solutes (such as salts, sugars, and proteins) than fresh water, so they are hypertonic.

Answer:

1. B. facilitated diffusion
2. Osmosis
3. Cells contain more solutes (e.g., salts, sugars, proteins) than fresh water, making them hypertonic.