Molecules that permeate a plasma membrane by facilitated diffusion
A. require an expenditure of energy.
B. require the aid of transport proteins.
C. move from an area of low concentration to an area of high concentration.
D. do so much more quickly than those crossing by simple diffusion.
Answer:B
Molecules that permeate a plasma membrane by facilitated diffusion
A. require an expenditure of energy. B. require the aid of transport proteins. C. move from an area of low concentration to an area of high concentration. D. do so much more quickly than those crossing by simple diffusion.