MICROANATOMY

Detailed explanation-1: -Juxtaglomerular cells are responsible for the production, storage, and release of a hormone called renin which regulates blood pressure. They are also called granular cells as they have a large amount of renin-secreting granules.

Detailed explanation-2: -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.

Detailed explanation-3: -The juxtaglomerular apparatus is a region of specialized smooth muscle cells called JG cells located in the afferent arteriole which, along with a set of columnar cells called the macula densa in the adjacent segment of distal convoluted tubule, sense changes in blood pressure and sodium concentration.