The small gap between two nerve cells is called a (n)

(A) threshold.

(B) synapse.

(C) action potential.

(D) node.

(B) Synapse

Explanation:

Synapse is a junction with small gap in between nuerons where chemical or electrical message in form of ions or chemicals (nuerotransmitter) is passed on to to other nerve or effector cells as part of communication, in the nervous system.