A chemical involved in the renin-angiotensin aldosterone system (RAAS), which plays a key role in blood pressure regulation. A high level of angiotensin II is responsible for narrowing blood vessels and raising blood pressure.
Small peptide from plasma globulin, angiotensinogen. Powerful vasoconstrictor and increases sodium reabsorption, partially through stimulation of release of aldosterone, and stimulates thirst. See also renin-angiotensin system, ACE.
a potent vasoconstrictor and growth-promoter produced by the RAAS following stimulation by renin; also triggers the release of vasopressin (a pituitary hormone that affects vascular tone and body fluid levels)
An octapeptide hormone present in blood produced by the enzymatic activation of the inactive decapeptide angiotensin I. It is a powerful vasopressor and a stimulator of aldosterone secretion by the adrenal cortex.
A hormone that causes an elevation in systemic blood pressure, stimulates the secretion of aldosterone, promotes thirst, and causes the release of antidiuretic hormone; angiotensin-converting enzyme in lung capillaries converts angiotensin I into angiotensin II.