The enzyme renin is produced by the kidney:
A) To activate antidiuretic hormone
B) In response to low plasma sodium levels
C) When too much sodium is being reabsorbed
D) To regulate secretion of hydrogen ions

Question

Quizplus · Accepted Answer

Renin is produced by the kidney in response to low plasma sodium levels. It plays a key role in the renin-angiotensin-aldosterone system (RAAS), which helps regulate blood pressure and fluid balance. Renin cleaves angiotensinogen, a plasma protein produced by the liver, to form angiotensin I, which is further processed to angiotensin II. Angiotensin II is a potent vasoconstrictor and stimulates aldosterone production, which promotes sodium and water reabsorption in the kidney.

The Enzyme Renin Is Produced by the Kidney