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Set 3 7 Muscle Energetics Fatigue And Training

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Question 1

(Multiple Choice)

Free
Lactic acid is produced by exercising muscle

A) W hen cytoplasm ic [pyruvate] and [NADH] rise
B) W hen NADH production outstrips its oxidation
C) During times of rapid glycolytic flux
D) To regenerate NAD+ so that glycolysis can continue
E) All of the above

Answer

Question 2

(Multiple Choice)

Free
One of the “purposes” of making lactic acid is that

A) It regenerates NAD+ needed in glycolysis
B) Is painful and so reduces muscle activation and metabolism
C) Carries energy to the m uscle mitochondria
D) Carries energy to glycolytic fibers
E) Both A and C are correct

Answer

Question 3

(Multiple Choice)

Free
A short-term effect of exercise is to increases glucose uptake by muscle cells by

A) Opening up a channel for glucose entry into the cell
B) Increasing the synthesis of more Glucose transporters
C) Inserting more copies of GLUT4 into the muscle fiber sarcolemma
D) Inserting copies of SGLT1 into the surface membrane
E) Both A and C are correct

Answer