Renin is secreted in response to a significant drop in blood pressure or blood volume.
The juxtaglomerular apparatus secrete renin, and as specialized smooth muscle cells surrounding the afferent arteriole also have the capacity to affect the perfusion of the glomerulus.
The main function of the Juxtaglomerular apparatus is to secrete Erythropoietin and Renin.
The juxtaglomerular apparatus functions to maintain blood pressure and to act as a quality control mechanism to ensure proper glomerular flow rate and efficient sodium reabsorption. The urethra extends from the bladder to the surface of the body.
Baroreceptors found in the arterioles trigger renin secretion if there is a fall in blood pressure in the arterioles. Activation of the sympathetic nervous system can also stimulate renin release through activation of beta-1 receptors.
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