Question

The function/s of the renin produced by kidney is/are

• A. Stimulate hematopoiesis
• B. Change angiotensinogen into angiotensin
• C. Influence ultrafiltration
• D. All of the above

Answer 1

Answer: (D)

All of the above

• Decreased blood pressure, low sodium levels are the stimuli for the production of renin from the kidney.
• The renin secreted has enzymatic activity and is an important part of the renin-angiotensin-aldosterone system (RAAS).
• The RAAS plays an important role in regulating the cardiac output and arterial pressure. It does it by regulating the ultrafiltration in the kidneys.
• The main function of renin in the RAAS system is the conversion of angiotensinogen to angiotensin I (proteolytic activity).
• Though the mechanism is not clearly understood the renin-angiotensin system (RAS) also plays an important role in the hematopoiesis.

Thus renin performs all the three functions. Hence, the correct option is D.