Angiotensin II

Question

Angiotensin II
A) causes vasodilation.
B) is secreted by the JGA.
C) elevates blood pressure.
D) activates angiotensinogen.

Accepted Answer

Angiotensin II is a potent vasoconstrictor and elevates blood pressure by increasing systemic vascular resistance. It is produced from angiotensin I through the action of ACE, which cleaves off two amino acids. It is not secreted by the JGA, nor does it cause vasodilation. Angiotensinogen is activated by renin released from the JGA to produce angiotensin I.