NEET Biology question
If a healthy man drinks one litre of water on occasion A and one litre of 0.9% saline on occasion B, what shall we expect in two hours?
| | Volume of urine | Concentration of Na+ in urine | |---|---|---| | Occasion A | | | | Occasion B | | |
Answer: (B)
Solution
Drinking plain water (occasion A) dilutes the blood, suppressing ADH release and producing a comparatively larger volume of dilute urine with a low Na+ concentration; drinking 0.9% saline (occasion B) raises blood Na+
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