Which is TRUE regarding diffusion?
A)It depends upon the random motion of molecules.
B)It results in net movement of molecules from regions of low concentration to regions of high concentration.
C)It is the principle mechanism by which molecules are moved over large distances in the body.
D)It requires energy in the form of ATP.
E)It requires integral membrane proteins to occur.

Question

Quizplus · Accepted Answer

Diffusion is a passive process that occurs due to the random motion of molecules. It does not require energy and results in net movement of molecules from regions of high concentration to low concentration. Choice B is therefore incorrect. Choice C is partially incorrect as diffusion can occur over small distances in the body but is not the principle mechanism for movement of molecules over large distances. Choice D is incorrect as diffusion does not require energy in the form of ATP. Choice E is also incorrect as diffusion can occur through simple diffusion without the aid of integral membrane proteins.

Which Is TRUE Regarding Diffusion