<Li> juxtaglomerular cells, (also known as granular cells) which secrete renin </Li> <Li> extraglomerular mesangial cells </Li> <P> The juxtaglomerular apparatus is part of the kidney nephron, next to the glomerulus . It is found between afferent arteriole and the distal convoluted tubule of the same nephron . This location is critical to its function in regulating renal blood flow and glomerular filtration rate . </P> <P> The juxtaglomerular apparatus consists of three cell types . They are: </P>

The juxtaglomerular apparatus regulates the filtration rate by