2.7

Question 1

Membrane proteins are required for

Answer 1

facilitated diffusion of charged and large polar molecules through a membrane

Question 2

Large quantities of water pass through

Answer 2

aquaporins

Question 3

Charged ions, including Na+ and K+, require

Answer 3

channel proteins to move through the membrane.

Question 4

Membranes may become

Answer 4

polarized by movements of ions across the membrane

Question 5

Membrane proteins are necessary for

Answer 5

active transport.

Question 6

Metabolic energy (such as from ATP) is required for

Answer 6

active transport of molecules and to establish and maintain concentration gradients.

Question 7

The Na+/K+ ATPase contributes to the

Answer 7

maintenance of the membrane potential.