Passive transport refers to a process that requires
A) no energy at all.
B) no cellular energy.
C) no pressure gradient.
D) no concentration gradient.
E) no electrical gradient.

Question

Quizplus · Accepted Answer

Passive transport does not require cellular energy, but it may require other gradients such as concentration, pressure, or electrical gradients. Option A is incorrect because some passive transport processes may require energy from an external source, such as the diffusion of gases across the respiratory membrane in the lungs. Options C, D, and E are incorrect because passive transport often occurs due to the presence of a concentration gradient, which is a type of gradient.

Passive Transport Refers to a Process That Requires