Lecture 13 - Digestion and Absorption of Dietary Lipids

Question 1

__________ are metabolic fuel and a building block for phospholipids and sphingolipids. A. Triglycerides B. Ketones C. Cholesterol D. Fatty acids

Answer 1

D

Question 2

______ are storage and major transport forms of fatty acids. A. Triglycerides B. Ketones C. Cholesterol D. Fatty acids E. Sphingolipids

Answer 2

A

Question 3

______ are soluble metabolic fuels for skeletal muscle, heart, kidney, and brain. A. Triglycerides B. Ketones C. Cholesterol D. Fatty acids E. Sphingolipids

Answer 3

B

Question 4

_________ are surface antigens and a structural component of membranes. A. Triglycerides B. Ketones C. Cholesterol D. Fatty acids E. Sphingolipids F. Phospholipids

Answer 4

E

Question 5

__________ is the precursor for bile acids, vitamin D, and the steroid hormones.

Answer 5

Cholesterol

Question 6

How does an increase in insulin affect the interconversion between acetyl-CoA and fatty acids?

Answer 6

Insulin promotes the synthesis of FAs (and the storage of lipids).

Question 7

How does an increase in glucagon affect the interconversion between acetyl-CoA and fatty acids?

Answer 7

Glucagon promotes oxidation of lipids (breakdown to acetyl CoA).

Question 8

_________ is the MAJOR enzyme that degrades TG in the intestine; it requires colipase. A. Pancreatic lipase B. Cholesterol esterase C. Phospholipase A

Answer 8

A

Question 9

_________ catalyzes the conversion from phospholipid to lysophospholipid and FA. A. Pancreatic lipase B. Cholesterol esterase C. Phospholipase A

Answer 9

C

Question 10

__________ catalyzes the conversion from cholesterol esters to cholesterol and FA. A. Pancreatic lipase B. Cholesterol esterase C. Phospholipase A

Answer 10

B

Question 11

What is the primary feature of bile acids that make them good emulsification agents?

Answer 11

Amphipathic structure

Question 12

What enzyme reforms fatty acyl-CoA to “activate it” and requires ATP? A. Fatty acyl-CoA transferase B. Fatty acyl-CoA synthetase C. ACAT D. Lipoprotein lipase

Answer 12

B

Question 13

Which enzyme catalyzes reformation of TG? A. Fatty acyl-CoA transferase B. Fatty acyl-CoA synthetase C. ACAT D. Lipoprotein lipase

Answer 13

A

Question 14

Which enzyme catalyzes reformation of cholesterol esters? A. Fatty acyl-CoA transferase B. Fatty acyl-CoA synthetase C. ACAT D. Lipoprotein lipase

Answer 14

C - short for Acyl CoA:cholesterol acyltransferase

Question 15

Insulin promotes __________ of fatty acids.

A. Synthesis

B. Storage

C. Mobilization

D. Oxidation

Answer 15

A - insulin promotes the synthesis of fatty acids and the storage of lipidss.