Which of the following statements regarding antihypertensive medication is correct? A. Calcium channel blockers are a class of drug used to reverse a decrease in blood volume. B. Diuretic medication principally affects peripheral resistance. C. Beta blockers target cardiac sympathetic innervation. D. ACE inhibitors promote the effects of the renin-angiotensin aldosterone system.
Option C. The neurotransmitters epinephrine & norepinephrine connect to the beta-1 receptor sites of the heart and cause HR & contractility to increase. This sympathetic stimulation promotes an increase in CO (and therefore BP). Blocking (stopping the binding of E and NE) their impact prevents sympathetic stimulation.