Question 1 The primary determinant of oxygen uptake during exercise is the: rela

Question

Question 1

The primary determinant of oxygen uptake during exercise is the:

relative mix of CHO and fat

exercise power output

exercise duration

Question 2

During the transition from rest to exercise there is an oxygen deficit, with the major contribution to energy metabolism coming from:

intramuscular ATP stores

"anaerobic" glycolysis of muscle glycogen

creatine phosphate degradation

Question 3

During the “slow” phase of the excess post-exercise oxygen consumption (EPOC) a factor contributing to increased oxygen uptake is:

lactate oxidation

creatine phosphate resynthesis

increased FFA oxidation

Question 4

The initial increase in heart rate at the onset of incremental exercise is due to:

increased venous return due to activation of the muscle pump

increased plasma adrenaline

reduced vagal activity

Question 5

Following endurance training, heart rate at a given oxygen uptake and cardiac output is lower because:

stroke volume is increased

red cell mass is increased

the heart is less sensitive to adrenergic stimulation

Question 6

Skeletal muscle hyperaemia during exercise is primarily due to:

activation of the muscle pump

metabolic vasodilators released from contracting skeletal muscle

sympathetic, cholinergic vasodilation

Question 7

The major stimulus for increased ventilation during exercise is:

CO2 flux to the lung

hypoxia

increased blood lactate

Question 8

Arterial hypoxemia during maximal exercise in trained subjects is thought to be primarily due to:

reduced cardiac output

diaphragmatic fatigue

pulmonary diffusion limitation

Question 9

Which of the following parameters is the most important determinant of maximal oxygen uptake:

maximal cardiac output

maximal ventilation

muscle oxidative capacity

Question 10

Erythropoietin administration results in an increase in VO2 max because:

an increase in red cell mass enhances oxygen delivery

blood buffer capacity is enhanced

blood viscosity is increased

Explanation / Answer

Please post only one question at a time:

Answer to question #1: The determinant of oxygen taken up during an exercise is both the duration as well as the intensity of the exercise but intensity is the primary determinant. Hence, the exercise power output is the most appropriate option that primarily determines oxygen uptake.

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