Facilitated diffusion utilizes channel or carrier proteins and moves substances down a concentration gradient passively, whereas active transport relies solely on carrier proteins and can move substances against a concentration gradient with the use of ATP.
Facilitated diffusion uses channel or carrier proteins and occurs down a concentration gradient without ATP, while active transport uses only carrier proteins and can move substances against a concentration gradient using ATP.
| Front | Contrast the processes of facilitated diffusion and active transport. [3 marks] |
|---|---|
| Back | 1. Facilitated diffusion involves channel or carrier proteins whereas active transport only involves carrier proteins; 2. Facilitated diffusion does not use ATP / is passive whereas active transport uses ATP; 3. Facilitated diffusion takes place down a concentration gradient whereas active transport can occur against a concentration gradient; |
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