Question

Which of the following statements on human kidney is false?

• A. Renal plasma flow is normally 660 ml/min.
• B. Blood flow in the cortex is greater than that in the medulla.
• C. Reabsorption of ions and water occur mainly in the distal convoluted tubules.
• D. Renal blood flow is decreased in dehydration.

Answer 1

Answer: (C)

Reabsorption of ions and water occur mainly in the distal convoluted tubules.

Reabsorption of ions and water mainly occurs in the proximal convoluted tubules. The proximal convoluted tubules(PCT) consist of simple cuboidal epithelium with a brush border. Reabsorption of ions and water mainly occurs in the PCT because they have microvilli which increase the surface area for selective reabsorption.

So, the correct answer is 'option C'.