Final answer:
Beta-blockers are sympatholytic drugs commonly used to treat cardiovascular disease, as they block ß-receptors associated with vasoconstriction and cardioacceleration. By allowing blood vessels to dilate and keeping heart rate from increasing, these drugs improve cardiac function. Examples include metoprolol and propranolol, which specifically and nonspecifically block ß-receptors respectively.
Step-by-step explanation:
Beta-blockers are sympatholytic drugs commonly used to treat cardiovascular disease. They work by blocking the ß-receptors associated with vasoconstriction and cardioacceleration, allowing blood vessels to dilate and keeping heart rate from increasing. By improving cardiac function, beta-blockers can benefit individuals with congestive heart failure or those who have suffered a heart attack.
One example of a beta-blocker is metoprolol, which specifically blocks the B1-receptor, while propranolol nonspecifically blocks ß-receptors. Other drugs, such as alpha-blockers, have a similar effect on the sympathetic system.