Question

The function/s of the renin produced by the kidney is/are
A. Stimulate hematopoiesis
B. Change angiotensinogen into angiotensin
C. Influence ultrafiltration
D. All of the above

Answer 1

Hint: Renin which is produced by the kidneys is a proteolytic enzyme that is released in the circulation by the kidneys. Renin causes an increase in blood pressure. It has an important part in the renin-angiotensin-aldosterone system (RAAS).

Complete answer: Renin is produced by the kidney as there is a decrease in pressure, the low sodium act as stimuli for the production of renin, it has enzymatic activity and plays an important role in the renin-angiotensin-aldosterone system also known as RAAS. The RAAS plays an important role in the stimulation of hematopoiesis, its main function is
the changing of angiotensinogen to angiotensin which is called the proteolytic activity, the RAAS influences the ultrafiltration by regulating the cardiac output and arterial pressure.

Additional information: The primary structure of the renin precursor contains 406 amino acids with a pre- and a pro-segment carrying 20 and 46 amino acids, respectively. Mature renin consists of 340 amino acids and has a mass of 37 kDa.

Hence, the correct option is ‘D’

Note: Renin-angiotensin system in the blood cells controls and maintains the blood pressure level. They increase water retention of the body by delivering sodium at different renal tubules sites.