This defecation reflex is the softest; Nerve impulses are sent from the descending colon to begin peristalsis movements and displace fecal matter.

GASTROINTESTINAL PHYSIOLOGY

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Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]

A	mysteric reflex
B	Reflejo vagovagal
C	reflex of parasympathetic fibers
D	gastrocolic reflex

Explanation:

Detailed explanation-1: -The rectoanal inhibitory reflex (RAIR) (also known as the anal sampling mechanism, anal sampling reflex, rectosphincteric reflex, or anorectal sampling reflex) is a reflex characterized by a transient involuntary relaxation of the internal anal sphincter in response to distention of the rectum.

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