Facilitated diffusion
A) involves a carrier molecule.
B) requires energy expenditure.
C) is how water enters the cells.
D) both (a) and (c) above.
E) all of these answers.

Question

Quizplus · Accepted Answer

Facilitated diffusion involves a carrier molecule to transport substances across the cell membrane.

Answer: D 
 Facilitated diffusion involves a carrier molecule and is the process by which water enters the cells. Therefore, both options (a) and (c) are correct.

Answer: E 
 All of the choices given are correct. Facilitated diffusion involves a carrier molecule, is the process by which water enters the cells, and does not require energy expenditure.

Facilitated Diffusion