Question

A severely hypertensive man suffering from a dissecting aortic aneurysm is given trimethaphan i.v. in order to rapidly lower his blood pressure. In addition to lowering of blood pressure, what other physiological effect would this drug produce?

A. blunting of all baroreceptor reflexes
B. bradycardia
C. increased GI motility & diarrhea
D. sweating
E. urination

Answer 1

The physiological effect of trimethaphan i.v. in addition to lowering blood pressure is blunting of all baroreceptor reflexes.

Step-by-step explanation:

The physiological effect of trimethaphan i.v. in addition to lowering blood pressure is blunting of all baroreceptor reflexes.

Baroreceptors are specialized cells located in the blood vessels that detect changes in blood pressure. They help regulate blood pressure by sending signals to the brain to adjust heart rate, blood vessel diameter, and fluid balance.

Trimethaphan, being a ganglionic blocker, affects the autonomic nervous system, inhibiting the function of baroreceptors and reducing their ability to respond to changes in blood pressure.