At a Capillary Bed, a Vasoconstrictor

question 62

Multiple Choice

At a capillary bed, a vasoconstrictor

• A) constricts local arterioles, thereby increasing pressure and increasing local blood flow.
• B) stimulates precapillary sphincters and decreases local blood flow.
• C) dilates local arterioles, thereby increasing pressure and increasing local blood flow.
• D) inhibits precapillary sphincters to relax and decreases local blood flow.
• E) constricts precapillary sphincters and thereby increases local blood flow.