Definition

Noun: A proteolytic enzyme secreted by the kidneys. It catalyzes the formation of angiotensin, a peptide hormone, and thus plays a crucial role in regulating blood pressure and fluid balance in the body.

Usage

Renin is a specific biochemical substance. It is used in medical, physiological, and scientific contexts. * Renin is released by the kidneys in response to low blood pressure or low sodium levels. * The renin-angiotensin system is a major hormonal pathway for blood pressure control. * Doctors may measure renin levels in the blood to help diagnose certain health conditions.

Examples

• The enzyme renin acts on angiotensinogen to produce angiotensin I.
• High renin activity is often associated with renal artery stenosis.
• Research focuses on drugs that inhibit renin to treat hypertension.

Advanced Usage

• Renin assay: A laboratory test to measure the amount of renin in the blood.
• Plasma renin activity (PRA): A common measurement that assesses the functional level of renin in the bloodstream.

Variants and Related Words

• Renin-angiotensin system (RAS): The hormone system that renin initiates, essential for regulating blood pressure and fluid balance.
• Renin inhibitor: A class of pharmaceutical drugs that block the activity of renin.

Synonyms

• Angiotensinogenase (This is a more technical biochemical synonym for renin, referring to its function of cleaving angiotensinogen.)

Noun

1. a proteolytic enzyme secreted by the kidneys; catalyzes the formation of angiotensin and thus affects blood pressure