Question

multiple choice question
angiotensin ii raises blood pressure. what is its primary mechanism?
vasoconstriction
na⁺ retention
na⁺ excretion
water retention

Explanation:

Angiotensin II's primary mechanism to raise blood pressure is vasoconstriction (narrowing of blood vessels), which increases peripheral resistance. While it also affects Na⁺ and water retention, vasoconstriction is the primary immediate mechanism. Na⁺ excretion is incorrect as it promotes retention.

Answer:

A. Vasoconstriction