Juxtaglomerular Apparatus

Q. Juxtaglomerular apparatus is a sensitive region formed at the location of contact of

1. distal convoluted tubule and efferent arterioles
2. proximal convoluted tubule and afferent arterioles
3. proximal convoluted tubule and efferent arterioles
4. distal convoluted tubule and afferent arterioles

Q.

Where Are Sertoli Cells Located?

Q. Which of the following is not true about Juxtaglomerular apparatus ?

1. Lies at the junction of distal tubule and against the afferent (efferent) arteriole
2. Arteriole walls have juxtaglomerular cells, enlarged smooth muscle cells, Have secretory granules containing renin, Act as mechanoreceptors
3. Macula densa function as chemoreceptors (sense concentrations of $(N{a}^{+},K^{+}andC{l}^{-})$ and on sensing higher levels of these ions, release prostaglandins which suppress the granular cells from releasing renin.
4. Mesangial cells, Have phagocytic and contractile properties, Influence capillary filtration

Q. Fall in glomerular filtration rate stimulates the

1. release of renin
2. secretion of $H^{+}$
3. secretion of $K^{+}$
4. secretion of ammonia

Q. Which of the following cells does not constitute the juxtaglomerular apparatus?

1. Macula densa cells, which are present along the distal convoluted tubule.
2. Juxtaglomerular cells, which are present in the wall of the afferent arteriole.
3. Extraglomerularmesangial cells, which nestle in between the afferent and efferent arterioles.
4. Podocytes, which are attached to the basement membrane

Q. Macula densa, granular cells and extra glomerular mesangial cells constitute the .

1. JFA
2. AGA
3. JGA
4. JAG