According to Poiseuille’s law of fluid flow, the volume flow rate, V, is proportional to radius to the fourth power. What would happen to the volume flow rate of blood if the diameter of an artery decreased to 20% (1/5) of its original diameter? V would:

Be one fifth (0.2) of its original value.

Be one twenty-fifth (0.04) its original value.

Be 1/625 (0.0016) of its original value.

Be five times its original value.

Be 1/625 (0.0016) of its original value. (1/5)⁴ = (0.2)⁴ = 0.0016. Narrowing of arteries has dire consequences for blood flow.

Cardiovascular System Author: rikazzz

A. Epicardium

B. Myocardium

C. Pericardium

D. Endocardium

A. Cardiac output is peripheral resistance multiplied by stroke volume.

B. Mean arterial pressure multiplied by peripheral resistance is cardiac output.

C. Cardiac output is heart rate multiplied by stroke volume.

D. Cardiac output is blood volume multiplied by heart rate.

A. The peak pressure in the blood due to contraction of the left ventricle.

B. The minimum pressure in the blood prior to contraction of the left ventricle.

C. It may be obtained by multiplying cardiac output by total peripheral resistance.

D. It is also known as mean arterial pressure.

A. As pressure of a gas increases, its solubility increases.

B. As volume of a gas increases, its pressure decreases.

C. As volume of a gas decreases, its pressure decreases.

D. As pressure of a gas increases, its solubility decreases.

A. Leucocyte

B. Eosinophil

C. Erythrocyte

D. Neutrophil

A. Volume would increase by 20%.

B. Volume would increase by 44%.

C. Volume would decrease by 44%.

D. Volume would decrease by 20%.

A. The semilunar valve

B. The mitral valve

C. The tricuspid valve

D. The aortic valve

Related posts