Question

97. Choose the false statement:

A. The connective tissues of veins are compliant in nature due to a preponderance of collagen versus elastin fibers: this serves to minimize vascular resistance as blood nears the heart.

B. The velocity of blood flow is slowest through the veins because blood pressure has dropped to very low levels by the time the blood reaches this part of the vascular system.

C. The vascular components most active in vasomotor regulation of blood pressure are the arterioles; regulation of these vessels is largely a local or regional phenomenon.

Answer 1

Answer:- B) The velocity of blood flow is slowest through the veins because blood pressure has dropped to very low levels by the time the blood reaches this part of the vascular system.

Reason- Blood flow is slowest in the capillaries. The velocity of blood flow is inversely proportional to the total cross-sectional area of the blood vessel, i.e as the diameter of vessel increases, there will be low velocity of blood. In capillaries, less velocity allows time for exchange of gases and nutrients.