CELL MEMBRANE AND TRANSPORT

Question 1

Define diffusion

Answer 1

Passive movement of a molecule or ion down a concentration gradient from a high to a low

Question 2

Define facilitated diffusion

Answer 2

The passive transfer of molecules or ions down a concentration gradient across a membrane by channel or carrier

Question 3

Define active transport

Answer 3

Movement of molecules or ions across a membrane against a concentration gradient
Using energy from the hydrolysis of ATP made by cell in respiration