Question

multiple choice question
which hormone binds to adrenergic receptors on the smooth muscle of most blood vessels and raises blood pressure by stimulating vasoconstriction?

antidiuretic hormone
aldosterone
epinephrine
natriuretic peptides

Explanation:

To solve this, we analyze each option:

• Antidiuretic hormone (ADH) mainly regulates water reabsorption in the kidneys, not vasoconstriction of most blood vessels via adrenergic receptors.
• Aldosterone regulates sodium and potassium balance, affecting blood volume, not direct vasoconstriction via adrenergic receptors.
• Epinephrine (adrenaline) binds to adrenergic receptors on smooth muscle of blood vessels, causing vasoconstriction and raising blood pressure.
• Natriuretic peptides promote vasodilation and reduce blood pressure, opposite of the effect described.

Answer:

C. Epinephrine