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Cardiovascular physiology questions

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Physiology

Question 1 of 9

1

ECC sequence of events are as follows except

Select one of the following:

  • Depolarization travels to sarcolemma - T tubules - T type Calcium channels are opened

  • Calcium released into the cytoplasm - 80%

  • Calcium that is released will activate Calcium release channels in the lateral sacs

  • 1&2 are wrong

  • All of them are wrong

Explanation

Question 2 of 9

1

All of the following regarding Reynold's number are true except?

Select one of the following:

  • Decrease in diameter increases the Reynold's number - mechanism in Aortic Stenosis

  • Severe Aortic stenosis (affecting the cardiac output) the increase in velocity - causes an increase in Reynold's number

  • In high altitude a decrease in viscosity will increase the Reynold's number

  • All of the above

Explanation

Question 3 of 9

1

All of the following cause an increase in pulse pressure except?

Select one of the following:

  • Aortic regurgitation

  • Exercise

  • AV fistula

  • Pulmonary regurgitation

Explanation

Question 4 of 9

1

All of the following about contractility are true except?

Select one of the following:

  • Catecholamines increase the contracility

  • Digitalis depresses the myocardium thereby decreasing contractility

  • Frequent stimulation increases the contractality

  • To assess contractility the preload has to be constant

Explanation

Question 5 of 9

1

All of the following are true about exercise except?

Select one of the following:

  • Increase in Systolic pressure because of increase in cardiac output

  • decrease in diastolic pressure because of increase in peripheral vascular resistance due to increased sympathetic activity

  • increased pulse pressure

  • decreased firing of the baroreceptors

Explanation

Question 6 of 9

1

All of the following are seen in Hypovolemic shock except

Select one of the following:

  • Systolic pressure is decreased

  • Diastolic pressure is increased

  • Pulse pressure increased

  • Peripheral vascular resistance increased

Explanation

Question 7 of 9

1

P1 is increased and P2 is decreased when there is an obstruction in all of the following except?

Select one of the following:

  • Aortic Stenosis

  • Mitral stenosis

  • Coarctation of aorta

  • femoral arterial obstruction

Explanation

Question 8 of 9

1

All of the following are true except?

Select one of the following:

  • Autoregulation is by which the constancy of flow is maintained with change in mean arterial pressure

  • Metabolites in the blood cause arteriolar vasodilation

  • Brain tissue pH if low causes cerebral vasodilation

  • The level of blood pH has little effect n cerebral blood flow

Explanation

Question 9 of 9

1

All of the following are true regarding autoregulation except?

Select one of the following:

  • It is a reflex

  • Brain, heart and skeletal muscle are examples of autoregulation

  • Kidney and gut do not have autoregulation

Explanation

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