Answer: A) help regulate blood pressure and the rate of blood filtration by the kidneys
Explanation: this is a structure(complex) in the nephron formed from the distal convoluted tubule and the afferent arteriole . it got its name because of it s closeness to the glomerulus (juxta)
structurally, it consists of
1. macuale densa.
2. juxtaglomerular cells
3. extraglomerular mensagial cells . together these formed the juxtaglomerular complex of the the kidney.