Question

which of the following forms of membrane transport allow solutes to move down a concentration gradient from an area of high concentration to an area of low concentration? choose any of the forms of membrane transport that apply. a b c d

Explanation:

• A: Facilitated diffusion (needs a protein channel but moves down the concentration gradient).
• B: Simple diffusion (moves down the concentration gradient without a protein channel for small non - polar molecules like \(O_2\) and small polar molecules like \(H_2O\) in some cases).
• C: Facilitated diffusion (moves down the concentration gradient through a protein channel).
• D: Active transport (moves against the concentration gradient, using energy, so it is not the answer).

Answer:

A. Option A, B. Option B, C. Option C