Angiotensin II

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Angiotensin II (pronounced: an·​gio·​ten·​sin | \ ˌan-jē-ō-ˈten(t)-sən \) is a peptide hormone that plays a crucial role in the RAS and regulates blood pressure and fluid balance in the body.

Etymology

The term "Angiotensin" is derived from the words "angio" meaning vessel and "tensin" meaning tension, referring to its vasoconstrictive properties. The "II" denotes that it is the second of two forms of the hormone.

Function

Angiotensin II is a potent vasoconstrictor, meaning it narrows blood vessels, which increases blood pressure. It also stimulates the release of the hormone aldosterone from the adrenal cortex, which promotes sodium retention by the kidneys, further increasing blood pressure.

Production

Angiotensin II is produced from angiotensin I through the action of the enzyme angiotensin-converting enzyme (ACE). This process occurs primarily in the lungs but can also take place in other tissues.

Related Terms

See Also

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