Which can produce a concentrated/ dilute urine. This is special mechanism. Identify the mechanism a. Reabsorption from PCT b. Reabsorption from collecting duct c. Reabsorption/Secretion in DCT d. Counter current mechanism in Henle’s loop/vasa recta.
Option D. The counter current mechanism helps to concentrate the filtrate which occurs in loop of Henle and vasa recta in the medulla region of the kidney. This gradient is mainly caused by NaCl and urea. It helps in eacy absorption of water from the filtrate present in the collecting duct so that the concentration of the filtrate (urine) is increased. therefore, hypertonic urine is produced in human beings.
