Urinalysis and Body Fluids 6th Edition by Majorie DiLorenzo, Susan Strasinger

Exercise 3

The type of nephron responsible for renal concentration is the:

A. Cortical

B. Juxtaglomerular

Step 1 of 2

Nephron:

• Nephrons in kidney help in the formation of urine.

• Each kidney contains millions of nephrons (1 to 1.5 million).

Nephrons are of two types in human:

• Cortical nephron

• Juxtaglomerular or juxtamedullary nephron

Juxtaglomerular nephron:

• Nephron has a U shaped structure called loops of henle.

• Juxtaglomerular nephron has long loops.

• These loops extend to the medulla of the kidney.

Function:

• The main role of Juxtaglomerular nephron is, concentrating the urine by sending the sodium into the medulla.

• When sodium enters into medulla the water moves out from medulla making the urine more concentrated with sodium.

Therefore, “juxtaglomerular nephron” is reason for the concentration of urine. Hence the correct answer is option.