What is the primary function of local or intrinsic cardiovascular control mechanisms?
a. Alter local blood flow according to tissue needs.
b. Alter the rate of cardiac contractions.
c. Maintain a basal level of systemic vascular tone.
d. Control the capacity of the venous reser-voir.
ANS: A
Local, or intrinsic, controls operate independently, without central nervous control. Intrinsic con-trol alters perfusion under normal conditions to meet metabolic needs.
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