angiotensin

Examples of angiotensin in the following topics:

• Other Hormonal Controls for Osmoregulation

  • The renin-angiotensin-aldosterone system (RAAS) stabilizes blood pressure and volume via the kidneys, liver, and adrenal cortex.
  • The renin-angiotensin-aldosterone system (RAAS) is a hormone system that regulates blood pressure and water (fluid) balance .
  • This system proceeds through several steps to produce angiotensin II, which acts to stabilize blood pressure and volume.
  • After renin facilitates the production of angiotensis I, angiotensin converting enzyme (ACE) then converts angiotensin I to angiotensin II.
  • The renin-angiotensin-aldosterone system increases blood pressure and volume.

• Hormonal Regulation of the Excretory System

  • When blood pressure drops, the renin-angiotensin-aldosterone system (RAAS) is activated.
  • When angiotensinogen is cleaved by renin, it produces angiotensin I, which is then converted into angiotensin II in the lungs.
  • Angiotensin II, in addition to being a potent vasoconstrictor, also causes an increase in ADH and increased thirst, both of which help to raise blood pressure.
  • Angiotensin II stimulates release of these hormones.
  • Angiotensin II, in turn, is formed when renin cleaves angiotensin.

• Adrenal Glands

  • If sodium levels are low in the blood, the kidney secretes more renin, an enzyme that stimulates the formation of angiotensin from a molecule made from the liver.
  • Angiotensin stimulates aldosterone secretion.

• Epinephrine and Norepinephrine

  • These hormones go one step further and trigger the renin-angiotensin-aldosterone system, the hormone system that regulates blood pressure and water (fluid) imbalance.

• Organs with Secondary Endocrine Functions

  • Renin, released in response to decreased blood volume or pressure, is part of the renin-angiotensin-aldosterone system that leads to the release of aldosterone.