Physiological 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

During exercise the cardiac output rises up to 5 times, but the rise in pulmonary vascular resistance is only a few mm Hg. Why?

Accepted Answer

Opening of parallel channels

Answer

Sympathetic stimulation causing vasodilatation

Answer

Pulmonary vasoconstriction

Answer

J receptors

Question 3

Which of the following parameters is most critical for maintaining optimal oxygenation?

Accepted Answer

PEEP

Answer

FiO2

Answer

Respiratory rate

Answer

Tidal volume

Question 4

Least useful for a 800-m run in a competitive event would be

Accepted Answer

Lohmann reaction

Answer

Pale muscle fibres

Answer

Muscle glycogen

Answer

Oxidative phosphorylation

Question 5

All of the following are increased in Acute stress except

Accepted Answer

Insulin

Answer

Growth hormone

Answer

Epinephrine

Answer

Glucagon

Question 6

When two different chemicals act on two different receptors and their responses are opposite to each other on the same cell, this phenomenon is called?

Accepted Answer

Physiological antagonism

Answer

Chemical antagonism

Answer

Reversible antagonism

Answer

Competitive antagonism

Question 7

A patient on long-term high-dose steroid therapy (prednisolone 20 mg/day for 6 months) is scheduled for major abdominal surgery. What is the most essential perioperative requirement?

Accepted Answer

Hydrocortisone only

Answer

Insulin only

Answer

Both

Answer

None of the options

Question 8

What is the recommended daily calcium intake for adult non-pregnant females?

Accepted Answer

1000 mg

Answer

1200 mg

Answer

600 mg

Answer

800 mg

Question 9

What will be the level of the uterus on the second day post delivery?

Accepted Answer

One finger breadth below umbilicus

Answer

Two finger breadths below umbilicus

Answer

Three finger breadths below umbilicus

Answer

Four finger breadths below umbilicus

Question 10

What is the physiological dose of hydrocortisone (mg/m2/day)?

Accepted Answer

10-12 mg/m²/day

Answer

20-25 mg/m²/day

Answer

15-18 mg/m²/day

Answer

8-10 mg/m²/day

Physiological Responses to Exercise — MCQs

Physiological Responses to Exercise — MCQs

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