A gap junction is
A)the point where a neurotransmitter vesicle binds to the presynaptic membrane.
B)a connection between two sections of a G protein that plays a role in second-messenger cascades.
C)a transmembrane channel that connects the cytoplasm of two cells at an electrical synapse.
D)more likely to be found on the amino acids than on the biogenic amines.

Question

Quizplus · Accepted Answer

A gap junction is a type of intercellular junction that allows direct communication between the cytoplasm of two adjacent cells. It is formed by transmembrane channels composed of connexins that span the plasma membranes of the two cells and create a pore that permits the passage of ions, molecules, and electrical signals. Gap junctions are found at electrical synapses and are important for synchronizing the activity of groups of neurons or muscle cells.

A Gap Junction Is