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WorksheetsExercise Physiology (OY)
Total questions: 10
Worksheet time: 5mins
Which of the following is not a factor regulating stroke volume?
Ventricular distensibility
Ventricular contractibility
Aortic pressure
Aortic return
At rest, where is most of the blood volume distributed?
Muscle
Brain
Internal organs
Peripheral limbs
What is the a-vO2 difference during maximal exercise?
8 ml/100ml
12 ml/100ml
16 ml/100ml
20 ml/100ml
What mechanism drives the first phase of ventilation during an exercise bout?
Anticipation and neural drive from central command
Changes on PCO2 and arterial stretch
Low circulating hydrogen ions
Increased in heat production from muscle contraction
What is Exercise-induced arterial hypoxemia?
A drop in PCO2 from poor ventilation
Ventilation-perfusion mismatch from high stroke volume
A drop in PO2 from poor ventilation
Ventilation-perfusion mismatch from high cardiac output
What is the preferred source of energy for prolonged exercise?
Muscle glycogen
Muscle lipids
Circulating glucose
Circulating free fatty acids
At approximately which exercise intensity does the contribution of lipids and carbohydrates are equal?
10%
30%
50%
70%
90%
During maximal exercise (e.g. sprinting), how long does it take for ATP to be depleted?
About 5 sec
About 15 sec
About 25 sec
About 35 sec
About 45 sec
What is the rate limiting enzyme of anaerobic glycolysis?
Phosphofruktokinase
Phosphohexo isomerase
phosphoglycerate kinase
pyruvate kinase
none
What is the rate limiting enzyme of the krebs cycle?
Citrate synthase
Succinate dehydrogenase
Malate dehydrogenase
Isocitrate dehydrogenase
none
