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If a healthy man drinks one litre of wat...

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?

A

`{:(" Occasion A",," Occassion B"),(underset("of urine")("Volume")" " underset("urine")underset("of " Na^(+) "in")("Concentration"),,underset("of urine")("Volume")" " underset("urine")underset("of " Na^(+) " in ")("Concentration")),(+++" " +,, " "+ " "+++):}`

B

`{:(" Occasion A",," Occassion B"),(underset("of urine")("Volume")" " underset("urine")underset("of " Na^(+) "in")("Concentration"),,underset("of urine")("Volume")" " underset("urine")underset("of " Na^(+) " in ")("Concentration")),(+++" " +,, " "+ " "+):}`

C

`{:(" Occasion A",," Occassion B"),(underset("of urine")("Volume")" " underset("urine")underset("of " Na^(+) "in")("Concentration"),,underset("of urine")("Volume")" " underset("urine")underset("of " Na^(+) " in ")("Concentration")),(++" " ++,, " "++ " "+++):}`

D

`{:(" Occasion A",," Occassion B"),(underset("of urine")("Volume")" " underset("urine")underset("of " Na^(+) "in")("Concentration"),,underset("of urine")("Volume")" " underset("urine")underset("of " Na^(+) " in ")("Concentration")),(+++" " ++,, ""+++ " "+++):}`

Text Solution

Verified by Experts

The correct Answer is:
B
When a healthy man drinks one litre of water on occasion A it releases normal volume of urine and `Na^(+)` concentration. But when he drinks one litre of 0.9% saline which is solution of NaCl, sodium concentration in blood increases and water follows it by osmosis. so, because of increase in absorption of water, volume of urine decreases and there will be no effect on `Na^(+)` concentration in volume of urine.
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