When molecules bind temporarily with a carrier protein in a cell's membrane and move across the membrane from areas of higher concentration to areas of lower concentration this is known as
A)simple diffusion.
B)endocytosis.
C)receptor-mediated osmosis.
D)active transport.
E)facilitated diffusion.

Question

Quizplus · Accepted Answer

This process is known as facilitated diffusion, where the molecules are transported across the membrane with the help of carrier proteins. This process does not require energy and moves the molecules from an area of higher concentration to an area of lower concentration. Simple diffusion (A) and active transport (D) also move molecules across membranes, but they require energy from the cell. Endocytosis (B) and receptor-mediated osmosis (C) involve the uptake of larger molecules and do not involve carrier proteins.

When Molecules Bind Temporarily with a Carrier Protein in a Cell's