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PHY3072 - Exercise physiology - S2 2026

PHY3072 - Exercise physiology - S2 2026

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During endurance exercise, which change is primarily responsible for the relatively small increase in mean arterial pressure (MAP) despite a large increase in cardiac output?

Increase in total peripheral resistance (TPR)

Decrease in total peripheral resistance (TPR)

100%

Decrease in stroke volume

Unchanged vascular tone

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Which of the following contributes to the lower aerobic capacity in women despite similar body mass and fat percentage?

Higher hemoglobin concentration

Lower breathing frequency

Smaller alveolar surface area

Lower oxygen carrying capacity

100%

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Which ONE of the following is a rate limiting step in glycolysis?

Conversion of 3-phosphoglycerate to 2-phosphoglycerate

Conversion of fructose 6-phosphate to fructose 1,6-bisphosphate

80%

Conversion of 1,2-bisphosphoglycerate to 3-phosphoglycerate

Conversion of fructose 1,2-bisphosphate to glyceraldehyde 3-phosphate

20%

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If mean arterial pressure (MAP) increases during acute strenuous exercise, what is the direct effect on stroke volume, assuming no other compensations?

SV unaffected

SV increases dramatically

SV decreases markedly due to preload limitation

100%

SV decreases slightly

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Which statement best describes the ventilatory response at high exercise intensities?

Both tidal volume and breathing frequency plateau

❌

Tidal volume decreases while breathing frequency increases

❌

Tidal volume plateaus while breathing frequency continues to increase