From the list of answer options that follows, select all that are accurate with
ID: 73335 • Letter: F
Question
From the list of answer options that follows, select all that are accurate with respect to lipid digestion in the human digestive tract.
A) There are no lipid-digesting enzymes dissolved in saliva.
B) Lingual lipases are lipid-digesting enzymes that are secreted by cells at the base of the tongue but are found dissolved in saliva.
C) Lingual lipase is at its optimal pH in the oral cavity.
D) Lingual lipase shows little enzyme activity in the oral cavity because it is at a very sub-optimal pH.
E) There is a lipid-digesting enzyme called gastric lipase that is secreted by some of the chief cells, especially those located in the fundus region of the stomach.
F) More lipid digestion occurs in the stomach than than occurs in the oral cavity because there are more lipases present (i.e. both lingual and gastric types) and the lipases present are at their optimal pH in the highly acidic gastric lumen.
G) Lipases convert triglycerides to free fatty acids and 2-monoglycerides.
H) More than 90% of the dietary lipids humans consume are triglycerides.
I) Only about 10%-30% of the ingested lipids have been converted to partial glycerides and free fatty acids when the chyme they are suspended in is passed to the small intestine.
J) The bulk of lipid digestion occurs in the small intestine.
K) Brush border enzymes in the small intestine are the major enzymes responsible for lipid digestion in the duodenum.
L) Pancreatic lipid-digesting enzymes are the major enzymes responsible for lipid digestion in the lumen of the small intestine.
Explanation / Answer
B) Lingual lipases are lipid-digesting enzymes that are secreted by cells at the base of the tongue but are found dissolved in saliva.
C) Lingual lipase is at its optimal pH in the oral cavity.
E) There is a lipid-digesting enzyme called gastric lipase that is secreted by some of the chief cells, especially those located in the fundus region of the stomach.
F) More lipid digestion occurs in the stomach than than occurs in the oral cavity because there are more lipases present (i.e. both lingual and gastric types) and the lipases present are at their optimal pH in the highly acidic gastric lumen.
H) More than 90% of the dietary lipids humans consume are triglycerides.
J) The bulk of lipid digestion occurs in the small intestine.
L) Pancreatic lipid-digesting enzymes are the major enzymes responsible for lipid digestion in the lumen of the small intestine.
Related Questions
drjack9650@gmail.com
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.