A patient has a narrowed arteriolar lumen caused by sympathetic stimulation. Which immediate effect is expected?
Correct answer: C. Increased peripheral resistance
- A. Reduced peripheral resistance
- B. Increased venous pooling
- C. Increased peripheral resistance
- D. Reduced arterial pressure from vasodilation
Explanation
Arteriolar constriction decreases the vessel radius and increases peripheral resistance, which tends to raise arterial pressure. Vasodilation has the opposite effect and reduces resistance.
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About Cardiovascular System
The cardiovascular system covers the chambers, valves and major vessels of the heart, the cardiac cycle, conduction pathway, blood pressure and the circulation through pulmonary and systemic circuits. It also explains artery, vein and capillary structure, exchange at capillary beds, and how the cardiac cycle differs from general blood flow.
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