Question

1. all of the following are kinds of passive transport except

a. diffusion b. facilitated diffusion c. osmosis d. ion channels

1. when molecules move down the concentration gradient it means they’re moving from

a. an area of low concentration to an area of higher concentration
b. an area of high concentration to an area of lower concentration

Explanation:

For question 7, passive transport is a type of membrane - transport that does not require energy. Diffusion, facilitated diffusion, and osmosis are all forms of passive transport. Ion channels can be involved in active transport as well as passive transport, and the question asks for the option that is not a kind of passive transport. For question 8, moving down the concentration gradient means moving from an area where there is a higher amount of a substance (higher concentration) to an area where there is less of the substance (lower concentration).

Answer:

1. D. ion channels
2. B. an area of high concentration to an area of lower concentration