A) Low levels of antidiuretic hormone
B) Maintaining hyperosmolarity towards inner medullary interstitium in the kidneys.
C) Secretion of erythropoietin by Juxtaglomerular complex
D) Hydrostatic pressure during glomerular filtration
Correct Answer: B
Solution :
The proximity between loop of henle and well as counter current in them help in maintaining an increasing osmolarity towards the inner medullary interstitium. This mechanism help to maintain a concentration gradient in medullary interstitium so human urine is nearly four times concentrated than initial filtrate formed.
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