Defecation is controlled by a __________.
A) myenteric reflex only
B) spinal reflex only
C) myenteric reflex and a spinal reflex

Question

Quizplus · Accepted Answer

Defecation is controlled by both the myenteric reflex and the spinal reflex. The myenteric reflex initiates contractions of the rectum and relaxation of the internal anal sphincter, while the spinal reflex coordinates relaxation of the external anal sphincter and contraction of the rectal muscles. Together, these reflexes allow for voluntary control over defecation.

Defecation Is Controlled by a __________