Question

Which of the following plays an important role in the production of concentrated urine?

• A. PCT and Loop of Henle
• B. Vasa recta and PCT
• C. Vasa rects and Loop of Henle
• D. Loop of Henle and DCT

Answer 1

The correct option is C Vasa rects and Loop of Henle

Although the loops of Henle are essential for concentrating urine, they do not work alone. The specialized blood capillary network (the vasa recta) that surrounds the loops is equally important. The vasa recta capillaries are long, hairpin-shaped blood vessels that run parallel to the loops of Henle. The hairpin turns slow the rate of blood flow, which helps maintain the osmotic gradient required for water reabsorption.

So the correct option is option C.