High-density lipoproteins (HDLs) are associated with the tranport of lipid from the
A. liver to periperal tissues.
B. peripheral tissues to the liver.
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Question 2) How do low-density lipoproteins (LDLs) move into cells?
A. LDLs diffuse through channels in the membrane.
B. LDLs are engulfed through receptor-mediated endocytosis.
C. LDLs diffuse through the phospholipid bilayer.
D. LDLs are transported through a pump that is also an ATPase.
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Question 3) Compared to other types of lipoproteins, very-low-density lipoproteins contain the _______ lipid.
A. most
B. least
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Question 4) Beta oxidation is a step in the synthesis of cholesterol that involves
A. closing of a linear fatty acid chain into a steroid loop.
B. breakdown of fatty acids into two-carbon units to form acetyl CoA.
C. synthesis of bile salts from precursor lipids.
D. absorption of micelles from the small intestine.
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Question 5) Because lipids are nonpolar, they must be wrapped by other molecules to be transported through the blood. This combined molecule is known as a ___________.
Fill in the blank with correct word.
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Question 6) The majority of the bile salts synthesized from cholesterol are removed from the body as a component of feces.
Indicate whether this statement is true or false.
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Question 7) Which statement accurately describes the flow of blood through sinusoids of the liver?
A. Blood flows within the sinusoids away from the central blood vessel.
B. Blood flows within the sinusoids toward the central blood vessel.
C. Some sinusoids contain blood flowing toward the center of the lobule, other sinusoids contain blood flowing away from the center of the lobule.
D. Blood and bile mix within the sinusoids and flow toward larger and larger bile ducts.
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Question 8) Blood within liver sinusoids comes from the hepatic artery and is headed toward the hepatic portal vein.
Indicate whether this statement is true or false.
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Question 9) Low dietary intake of cholesterol triggers cholesterol synthesis within the liver to increase.
Indicate whether this statement is true or false.
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Question 10) What effect does glucagon have on protein metabolism?
A. It directly stimulates catabolism of proteins.
B. It stimulates the buildup of proteins from amino acids.
C. It increases absorption of amino acids in the intestine.
D. It has no effect on body proteins.
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