Question

Juxtaglomerular cells secrete _____when there is a fall in ____ ion concentration. Choose the correct pair labelled as A and B

• A. A: Renin, B: Chloride
• B. A: Carbonic unhydrase B: Sodium
• C. A: ATPsae B: Potassium
• D. A: Renin B: Sodium

Answer 1

The correct option is D A: Renin B: Sodium

• Juxtaglomerular cells secrete the renin which mainly controls the level of sodium in the blood.
• When the concentration of sodium is lower in the blood the juxtaglomerular cells secrete renin which activates angiotensin.
• Angiotensin constricts the arterioles to increase the blood pressure and stimulates the release of aldosterone from the adrenal cortex which promotes the reabsorption of sodium ions and maintains a constant sodium level and water level in the blood.

So, the correct answer is option D.