Angiotensin II

Definition

Angiotensin II is a potent vasoconstrictor involved in regulating blood pressure and fluid balance. It plays a crucial role in the renin-angiotensin-aldosterone system (RAAS).

5 Must Know Facts For Your Next Test

1. Angiotensin II causes blood vessels to constrict, increasing blood pressure.
2. It stimulates aldosterone secretion from the adrenal cortex, leading to sodium and water retention.
3. ACE inhibitors block the conversion of angiotensin I to angiotensin II, lowering blood pressure.
4. Angiotensin II receptor blockers (ARBs) prevent angiotensin II from binding to its receptors.
5. High levels of angiotensin II are associated with hypertension and cardiovascular diseases.

Review Questions

• What is the primary function of angiotensin II in the body?
• How do ACE inhibitors affect angiotensin II?
• What role does angiotensin II play in the renin-angiotensin-aldosterone system?

Related terms

ACE Inhibitors: Drugs that inhibit the enzyme converting angiotensin I to angiotensin II.

ARBs: Medications that block the effects of angiotensin II by preventing it from binding to its receptors.

Aldosterone: A hormone stimulated by angiotensin II that increases sodium and water reabsorption in kidneys, raising blood pressure.