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    Principles of Human Physiology
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    Exam 20: The Gastrointestinal System
  5. Question
    What Stimulates the Defecation Reflex
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What Stimulates the Defecation Reflex

Question 58

Question 58

Multiple Choice

What stimulates the defecation reflex?


A) pressure on the internal anal sphincter
B) distention of the descending colon
C) increase in osmolarity of the rectum
D) peristaltic contraction of the sigmoid colon
E) distention of the rectum

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