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Question
Assertion :
Kidneys maintain the osmotic concentration of the blood. Reason: Kidneys eliminate either hypotonic or hypertonic urine according to the need of the body.
Assertion :
Kidneys maintain the osmotic concentration of the blood.
Reason: Kidneys eliminate either hypotonic or hypertonic urine according to the need of the body.
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Solution
The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
Kidneys play an essential role in maintaining the concentration and
osmotic pressure (osmoconcentration) of the blood. When water intake of
an animal is very high, the urine excreted has to be hypotonic i.e.,
dilute and lower in osmotic pressure than their blood in order to remove
the excess of water contrary to this, when there is a threat of
excessive water loss from the body; the urine needs to be hypertonic
more concentrated and higher in osmotic pressure than their blood, to
reduce the loss of water with urine. In this way, the osmotic
concentration of the blood is maintained.So, the correct answer is 'Both Assertion and Reason are correct and Reason is the correct explanation for Assertion'.
Kidneys play an essential role in maintaining the concentration and
osmotic pressure (osmoconcentration) of the blood. When water intake of
an animal is very high, the urine excreted has to be hypotonic i.e.,
dilute and lower in osmotic pressure than their blood in order to remove
the excess of water contrary to this, when there is a threat of
excessive water loss from the body; the urine needs to be hypertonic
more concentrated and higher in osmotic pressure than their blood, to
reduce the loss of water with urine. In this way, the osmotic
concentration of the blood is maintained.
So, the correct answer is 'Both Assertion and Reason are correct and Reason is the correct explanation for Assertion'.
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