The cells of the macula densa and the juxtaglomerular cells form the

The preferable option will be - B.

B. juxtaglomerular complex.

Explanation:

The cells of the macula densa, the juxtaglomerular cells, and the extraglomerular mesangial cells together form the juxtaglomerular complex or juxtaglomerular apparatus.

The given options were -

a. nephron loop (loop of Henle).

b. juxtaglomerular complex.

c. renal corpuscle.

d. filtration membrane.

e. afferent arteriole.

The juxtaglomerular apparatus regulates the blood pressure and also regulates the filtration rate of the glomerulus.