Cardiovascular Responses to Exercise Practice Questions

Question 1

Which of the following is a FALSE statement regarding hemodynamic changes occurring during exercise?

Accepted Answer

Venoconstriction in exercising muscles as well as increased cardiac output leads to marked increase in systemic blood pressure.

Answer

Venous return is augmented by the pumping action of skeletal muscles.

Answer

End-diastolic volume increases in the failing heart during exercise.

Answer

The increased adrenergic nerve impulses to the heart as well as an increased concentration of circulating catecholamines help to augment the contractile state of the myocardium.

Question 2

Which of the following causes coronary vasodilation?

Accepted Answer

Adenosine

Answer

Noradrenergic stimulation

Answer

Hypocarbia

Answer

None of the options

Question 3

If the contractility of the heart is decreased, which of the following is seen ?

Accepted Answer

Decreased stroke volume

Answer

Increased ejection fraction

Answer

Increased stroke work

Answer

Increased cardiac output

Question 4

During heavy exercise the cardiac output (CO) increases up to five fold while pulmonary arterial pressure rises very little. This physiological ability of the pulmonary circulation is best explained by

Accepted Answer

Increase in the number of open capillaries

Answer

Large amount of smooth muscle in pulmonary arterioles

Answer

Sympathetically mediated greater distensibility of pulmonary vessels

Answer

Smaller surface area of pulmonary circulation

Question 5

Concentric hypertrophy of left ventricle is seen in -

Accepted Answer

Congenital aortic stenosis due to bicuspid aortic valve

Answer

Mitral Stenosis

Answer

Aortic Regurgitation

Answer

Hypertrophic Obstructive Cardiomyopathy

Question 6

Blood supply to the brain during moderate exercise:

Accepted Answer

Remains constant

Answer

Fluctuates unpredictably

Answer

Increases

Answer

Decreases

Question 7

During exercise in physiological limits, what is the effect on end systolic volume?

Accepted Answer

ESV decreases

Answer

ESV increases

Answer

ESV first decreases and then increases

Answer

ESV remains unchanged

Question 8

The blood levels of hormones are elevated during exercise and sleep as shown. Which hormone would exhibit this diurnal pattern?

Accepted Answer

Growth hormone

Answer

Insulin

Answer

Cortisol

Answer

Thyroid hormones

Question 9

There are two blood vessels shown below. Assuming that pressure along both the vessels is same and both of them follow linear flow pattern, what will be the amount of blood flow in A compared to B?

Accepted Answer

32 times

Answer

4 times

Answer

8 times

Answer

16 times

Question 10

Cushing reflex is associated with all except?

Accepted Answer

Hypotension

Answer

Irregular respiration

Answer

Increased intracranial pressure

Answer

Bradycardia

Cardiovascular Responses to Exercise — MCQs

Cardiovascular Responses to Exercise — MCQs

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