What increases the blood supply to tissues with inadequate blood supply as larger vessels gradually narrow or harden?
a. increased heart rate c. vasodilation
b. increased blood pressure d. collateral circulation
D
Collateral circulation improves as larger vessels gradually narrow or harden. Blood that normally passes through the larger vessels is shunted into surrounding smaller vessels. These collateral vessels enlarge in an attempt to supply blood to the affected area. Collateral circulation increases the blood supply to tissues with an inadequate blood supply.
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