Which reflex inhibits gastric motility when the ileum becomes overdistended?
a. Ileogastric
b. Gastroduodenal
c. Gastroileal
d. Gastrocolic
ANS: A
The ileogastric reflex, not the gastroduodenal, inhibits gastric motility when the ileum becomes distended. The gastroileal reflex, which is activated by an increase in gastric motility and secre-tion, stimulates an increase in ileal motility and relaxation of the ileocecal valve (sphincter). The gastrocolic reflex initiates propulsion in the entire colon, usually during or immediately after eat-ing, when chyme enters from the ileum.
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