The movement of substances from an area of high concentration to an area of low concentration by interacting with a carrier molecule is an example of
A) osmosis.
B) active transport.
C) diffusion.
D) facilitated diffusion.
E) filtration.

Question

Quizplus · Accepted Answer

The movement of substances from an area of high concentration to an area of low concentration with the help of a carrier molecule is called facilitated diffusion. This process does not require energy and is a passive process, unlike active transport. Osmosis is the movement of water molecules across a selectively permeable membrane, while filtration involves the movement of molecules through a membrane under the influence of pressure gradients.

The Movement of Substances from an Area of High Concentration