Gap junctions are channels that can allow the diffusion between cells of all of the following except
A) small signal molecules.
B) ions.
C) certain hormones.
D) large proteins.
E) second messengers.

Question

Quizplus · Accepted Answer

Gap junctions are channels formed by the connexin proteins and can allow the diffusion of small molecules, ions, certain hormones, and second messengers between adjacent cells. However, they are not large enough to allow the diffusion of large proteins.

Gap Junctions Are Channels That Can Allow the Diffusion Between