The nerve cell circuit involved in the defensive reflex of the Aplysia involves both _________ and _________ interneurons.
A) internal; external
B) small; large
C) ganglion; clustered
D) excitatory; inhibitory

Question

Quizplus · Accepted Answer

The Aplysia defensive reflex circuit involves both excitatory and inhibitory interneurons. Excitatory interneurons trigger the contraction of the gill muscles, while inhibitory interneurons prevent the activation of the siphon-withdrawal reflex. Both types of interneurons work together to coordinate and control the defensive response of the Aplysia.

The Nerve Cell Circuit Involved in the Defensive Reflex of the Aplysia