The movement of glucose across a plasma membrane is achieved by
A)ion pumps.
B)receptor-mediated exocytosis.
C)osmosis.
D)facilitated diffusion.
E)phagocytosis.

Question

Quizplus · Accepted Answer

Glucose is a polar molecule and cannot move across the plasma membrane via simple diffusion. It requires the help of a membrane protein that facilitates its movement across the membrane. This process is called facilitated diffusion, which involves the movement of glucose down its concentration gradient, from an area of higher concentration to an area of lower concentration, without requiring energy input from the cell.

The Movement of Glucose Across a Plasma Membrane Is Achieved