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Select the incorrect statement regarding mechanism of urine formation in man.
The glomerular filtration rate is about 125 ml per minute.
The ultrafiltration is opposed by the colloidal osmotic pressure of plasma
Aldosterone induces greater reabsorption of sodium
The counter current system contributes in diluting the urine
Answers (1)
MECHANISM OF CONCENTRATION OF THE FILTRATE -
Transport of substances facilitated by the special arrangement of Henle’s loop and vasa recta is called the counter current mechanism
- wherein
This mechanism helps to maintain a concentration gradient in the medullary interstitium. Presence of such interstitial gradient helps in an easy passage of water from the collecting tubule thereby concentrating the filtrate (urine). Human kidneys can produce urine nearly four times concentrated than the initial filtrate formed.
Correct option is 4
