Juxtaglomerular apparatus is made up of

Options

A. juxtaglomerular cells, macula densa and lacis cells
B. juxtaglomerular cells, lacis cells and myoepithelial cells
C. juxtaglomerular cells, macula densa and argentaffin cells.
D. None of the above

Answer

A

Explanation

Juxtaglomerular cells are the cmooth muscle cells of both the afferent and efferent arterioles that are swolles and contain dark granules. These cells secrete renin. Macula densa are the epithelial cells of the distal convoluted tubule that come in contact with the afferent and effeerent arterioles. These cells are more dense than the other tubular cells. They act as chemoreceptors Lacis cells are located in the interval between the macula densa and the afferent and efferent arterioles. The function of lacis cells is unknown. All these cells make up juxtaglomerular apparatus.