Defecation is normally stimulated by what physiologic trigger?
A) Movements and reflexes in the gastrointestinal tract
B) Stimulation from the medulla oblongata
C) Synthesis and release of digestive enzymes
D) Changes in the osmolarity of bowel contents
A
Feedback:
Defecation is normally stimulated by movements and reflexes in the gastrointestinal tract. It does not result from changes in osmolarity, CNS stimulation, or the release of enzymes.
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