Diffusion is a mode of membrane transport in which

Question

Quizplus · Accepted Answer

Diffusion is the passive movement of molecules or ions from a region of higher concentration to a region of lower concentration down the concentration gradient. Therefore, option B, substances move down the concentration gradient, is the correct choice. Options A and D are incorrect because diffusion is a passive process and does not require an input of energy to move substances uphill or against the gradient. Option C is incorrect because substances do not move towards higher concentration in diffusion, but rather move from higher to lower concentration.

Diffusion Is a Mode of Membrane Transport in Which