In general, as an artery's diameter decreases, the artery walls show

A.  a decrease in the relative amount  of smooth muscle and an increase in the relative amount  of elastic fibers.
B.  an increase in the relative  amount of smooth muscle and a decrease in the relative amount  of elastic fibers.
C.  an increase in relative amounts of  smooth muscle and elastic fibers and a decrease in endothelium.
D.  a decrease in both smooth muscle and elastic fibers and an increase in areolar connective tissue.


Answer: B. an increase in the relative  amount of smooth muscle and a decrease in the relative amount  of elastic fibers.

Anatomy & Physiology

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