How would an elevated level of thyroid hormone in the body affect skeletal muscles?
A) It would stimulate atrophy.
B) It would stimulate hypertrophy.
C) It would stimulate energy use and heat production.
D) It would decrease heat production by muscle tissue.
E) It would cause an increase in muscle mass.
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Question 2) Which of the following hormones directly stimulates growth of muscle tissue, leading to increased muscle mass?
A) epinephrine
B) thyroid hormone
C) testosterone
D) parathyroid hormone
E) calcitonin
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Question 3) During the recovery period following exercise, all of the following are true except
A) lactic acid is removed from muscle cells.
B) the muscle actively produces ATP.
C) muscle fibers are unable to contract.
D) oxygen is consumed at above the resting rate.
E) heat is generated.
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Question 4) Aerobic metabolism normally provides ________ percent of the ATP demands of a resting muscle cell.
A) 25
B) 50
C) 70
D) 95
E) 100
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Question 5) During anaerobic glycolysis,
A) ATP is produced.
B) pyruvic acid is produced.
C) oxygen is not consumed.
D) carbohydrate is metabolized.
E) All of the answers are correct.
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Question 6) Creatine phosphate
A) is produced by the process of anaerobic respiration.
B) can replace ATP in binding to myosin molecules during contraction.
C) acts as an energy reserve in muscle tissue.
D) is only formed during strenuous exercise.
E) cannot transfer its phosphate group to ADP.
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Question 7) A resting muscle generates most of its ATP by
A) hydrolysis of creatine phosphate.
B) anaerobic respiration.
C) aerobic metabolism of fatty acids.
D) glycogenolysis.
E) the tricarboxylic acid cycle.
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Question 8) Which of the following allows muscles to return to their original shape during relaxation?
A) gravity
B) opposing muscle contractions
C) elastic forces
D) myosin binding
E) gravity, opposing muscle contractions, and elastic forces
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Question 9) The type of contraction where the tension is less than the load is called
A) isometric contraction.
B) isotonic eccentric contraction.
C) isotonic concentric contraction.
D) isometric concentric contraction.
E) isometric eccentric contraction.
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Question 10) The type of contraction where the tension exceeds the load is called
A) isometric contraction.
B) isotonic eccentric contraction.
C) isotonic concentric contraction.
D) isometric concentric contraction.
E) isometric eccentric contraction.
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