Question 1
Mechanisms that do
not help regulate blood pressure include ________.
◦ renal regulation via the renin-angiotensin system of vasoconstriction
◦ the dural sinus reflex
◦ nervous control that operates via reflex arcs involving baroreceptors, chemoreceptors, and higher brain centers
◦ chemical controls such as atrial natriuretic peptide
Question 2
The velocity of blood flow is ________.
◦ slowest in the capillaries because the total cross-sectional area is the greatest
◦ in direct proportion to the total cross-sectional area of the blood vessels
◦ slower in the arteries than in capillaries because arteries possess a relatively large diameter
◦ slower in the veins than in the capillaries because veins have a large diameter
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