Question

Which of the following are components of the Juxtaglomerular Apparatus (JGA)?

a) Afferent arteriole, macula densa, and distal convoluted tubule.
b) Glomerular capsule, efferent arteriole, and loop of Henle.
c) Proximal convoluted tubule, renal corpuscle, and collecting duct.
d) Bowman's capsule, glomerulus, and proximal tubule.

Answer 1

The JGA includes the afferent arteriole, macula densa, and distal convoluted tubule, which work together to monitor and regulate the composition of fluid in the DCT and glomerular filtration rate.

Step-by-step explanation:

The components of the juxtaglomerular apparatus (JGA) primarily include the afferent arteriole, which supplies blood to the glomerulus, and the macula densa, a group of specialized cells located in the initial part of the distal convoluted tubule (DCT). These cells play a crucial role in monitoring the sodium concentration and the rate of fluid flow through the DCT and in responding with paracrine signals that adjust the glomerular filtration rate (GFR). Hence, option (a) is correct: Afferent arteriole, macula densa, and distal convoluted tubule.