How does propranolol (Inderal) control hypertension?
a. Blocks alpha receptors throughout the body
b. Increases the diuretic response in the renal tubules
c. Reduces the sympathetic stimulation in cardiac muscle
d. Inhibits the conversion of angiotensin I to angiotensin II
ANS: C
The beta-adrenergic blocking agents block beta receptor stimulation in the heart, which then inhibits cardiac response to sympathetic nerve stimulation. This results in a decrease in heart rate, cardiac output, and blood pressure. Beta blockers do not affect alpha receptors. Beta blockers do not have a diuretic effect. ACE inhibitors are in the class of drugs that affects angiotensin conversion.
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