Lecture 12 - MC Flashcards
Where does the digestion of lipids begin in the human body?
A) In the mouth
B) In the stomach
C) In the small intestine
D) In the large intestine
A
What is the primary role of lingual and gastric lipases in the digestion of lipids?
A) They hydrolyze long chain fatty acids.
B) They hydrolyze short and medium chain fatty acids.
C) They form micelles for lipid absorption.
D) They transport lipids across the cell membrane.
B
How do bile salts affect the activity of lipase in the duodenum?
A) They activate lipase by binding to it.
B) They inhibit lipase by displacing it from the lipid substrate.
C) They have no effect on lipase activity.
D) They enhance the binding of lipase to long chain fatty acids.
B
What is the function of co-lipase in the digestion of lipids?
A) It inhibits lipase activity.
B) It assists in the absorption of micelles into enterocytes.
C) It reverses the inhibition of lipase by bile salts.
D) It transports lipids in the blood.
C
How are lipids primarily absorbed into the enterocytes in the intestine?
A) Through active transport using enzymes
B) Via passive diffusion through the lipid bilayer
C) Using vesicles that engulf the lipids
D) By conversion into monoglycerides first
B
Which lipoprotein is primarily responsible for transporting lipids from the intestine to the blood?
A) LDL
B) VLDL
C) HDL
D) Chylomicrons
D
What is the primary function of apoproteins associated with lipoproteins?
A) They dictate the fate of lipoproteins and their distribution in the body.
B) They break down the lipids within the lipoproteins.
C) They act as enzymes to further digest lipids.
D) They store excess lipids for future energy use.
A
Which apoprotein is unique to chylomicrons originating from the intestine?
A) ApoA-I
B) ApoB-48
C) ApoB-100
D) ApoE
B
