Which statement concerning 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) When mass movements of the colon propel feces into the rectum, stimulation of the stretch receptors in the rectal wall reflexively causes contraction of the internal and external anal sphincters to prevent defecation from occurring until an opportune time.
D) No digestive enzymes are secreted by the colon.

Question

Quizplus · Accepted Answer

The correct statement is that the stimulation of stretch receptors in the rectal wall causes relaxation of the internal anal sphincter and contraction of the external anal sphincter, allowing defecation to occur when appropriate.

Which Statement Concerning the Colon Is INCORRECT