As people age, their systolic blood pressure tends to rise. What is the primary cause of this increase in the systolic measurement?
a. Increased compliance in the large arteries
b. Progressive replacement of elastin in the walls of the large arteries
c. Increased sympathetic nervous system activity, which leads to increased vasoconstriction
d. Decreased compliance in the large arteries
ANS: D
With aging, compliance decreases and stiffness increases in the large arteries.
As people age, compliance in the large arteries decreases rather than increases.
With aging, elastin in the walls of the large arteries is progressively replaced with collagen; however, this is not the primary cause of the increase in the systolic measurement.
Sympathetic nervous system activity does not increase in older individuals.
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ANS:
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