Question

Renin is secreted by
A. Cortex
B. Medulla
C. Juxtaglomerular cells
D. Podocytes

Answer 1

Hint:- Renin (historical underpinnings and elocution), otherwise called an angiotensinogenase, is an aspartic protease protein and compound emitted by the kidneys that participates in the body's renin–angiotensin–aldosterone framework (RAAS)— also called the renin–angiotensin–aldosterone system —that intercedes the volume of extracellular liquid (blood plasma, lymph and interstitial liquid) and blood vessel vasoconstriction. Hence, it controls the body's mean blood vessel circulatory strain.

Complete Answer:-
Renin is emitted by pericytes (mural cells)in the region of the afferent arterioles and comparable microvessels of the kidney from specific cells of the juxtaglomerular contraption—the juxtaglomerular cells, because of three upgrades:
A decrease in arterial blood pressure (that could be related to a decrease in blood volume) as detected by baroreceptors (pressure-sensitive cells). This is the most immediate causal connection between circulatory strain and renin emission (the other two strategies work by means of longer pathways).
A diminishing in sodium load conveyed to the distal tubule. This heap is estimated by the macula densa of the juxtaglomerular. Sensory system movement, which additionally controls circulatory strain, acts through the β1 adrenergic receptors.
Human renin is discharged by in any event 2 cell pathways: a constitutive pathway for the emission of the forerunner prorenin and a regulated pathway for the emission of develop renin.

Note:- Renin circulates in the circulation system and hydrolyzes (separates) angiotensinogen discharged from the liver into the peptide angiotensin I. Angiotensin I is additionally separated in the lungs by endothelial-bound angiotensin-changing over compound (ACE) into angiotensin II, the most vasoactive peptide.[8][9] Angiotensin II is an intense constrictor of all veins. It follows up on the smooth muscle and, thus, raises the obstruction presented by these supply routes to the heart.
Hence, the correct answer is option (C) Juxta glomerular cells.