Which statement about the colon is incorrect?
A)Absorption of salt and water converts the colonic contents into fecal material.
B)Colonic bacteria digest cellulose for their own growth and reproduction.
C)Mass movements pack feces into the rectum and stimulate stretch receptors to cause contraction of both anal sphincters, which prevent defecation until an opportune time.
D)No digestive enzymes are secreted by the colon.
E)Haustral contractions are a type of mixing motility.

Question

Quizplus · Accepted Answer

Mass movements stimulate stretch receptors to cause relaxation, not contraction, of the internal anal sphincter, allowing defecation when the external sphincter is voluntarily relaxed.

Which Statement About the Colon Is Incorrect