True about Dietary fat?
A. Is ingested primarily as cholesterol
B. Can only be absorbed as free fatty acid
C. Stimulates cholecystokinin release from the small intestine
D. Decreases small intestinal transit time
A. Is ingested primarily as cholesterol
B. Can only be absorbed as free fatty acid
C. Stimulates cholecystokinin release from the small intestine
D. Decreases small intestinal transit time
Ans.
C. stimulates cholecystokinin release from the small intestine
Ingested fat is predominantly
triglyceride and is broken down by pancreatic lipase to free fatty acids or
monoglyceride. Fatty acid stimulates cholecystokinin release 13.1 from mucosal
endocrine cells of the small intestine resulting in gallbladder contraction and
delivery of bile salts to the intestine. Bile salts aid micelle formation by
emulsification with fatty acids and monoglyceride which are then absorbed. Any
unabsorbed tat reaching the distal small intestine slows intestinal transit, a
reflex termed the ileal brake.
