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Assertion : Kidneys maintain the osmotic...

Assertion : Kidneys maintain the osmotic concentration of the blood .
Reason : Kidneys eliminate either hypotonic or hypertonic urine according to the need of the body .

A

If both the assertion and the reason are true and the reason is a correct explanation of the assertion

B

If both the assertion and the reason are true and the reason is not a correct explanation of the assertion

C

If the assertion is true but the reason is false

D

If both the assertion and reason are false

Text Solution

Verified by Experts

The correct Answer is:
A
(a) Kidneys play an essential role in maintaining the concentration and osmotic pressure (osmoconcentration)of blood . When water intake of an animal is very high, the urine excreted has to be hypotonic i.e., dilute and lower in omotic 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 hydertonic more concentrated and higher in osmotic pressure than their blood , to reduce the loss of the water with urine . In this way , the osmotic concentration of the bloods is maintanied .
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Knowledge Check

  • The blood supply to kidney's is maintained through

    A
    renal artery
    B
    renal vein
    C
    hepatic artery
    D
    Both (a) and (b)

  • The process of maintaining osmotic and ionic concentrations of body fluids is known as

    A
    excretion
    B
    osmoregulation
    C
    homeostasis
    D
    Both (a) and (b)

  • Assertion : The birds can maintain a constant body temperature. Reason : Birds possess feathers covering their body

    A
    If both the assertion and the reason are true and the reason is a correct explanation of the assertion
    B
    If both the assertion and reason are true but the reason is not a correct explanation of the assertion
    C
    If the assertion is true but the reason is false
    D
    If both the assertion and reason are false

    • Similar Questions

    Explore conceptually related problems

    The concentration of creatinine in the blood is measured to examine the condition of kidney. Give reason.

    Assertion : The aquatic organisms in which the osmotic concentration and temperature of body change according to the ambient conditions of water are referred to as conformers. Reason : Aquatic organisms are able to maintain homeostsis through thrmoregulation and osmoregulation by physiological or behavioural means.

    Assertion: Kidneys are retroperitoneal in position. Reason: Kidneys are covered with peritoneum only on ventral surface.

    Assertion : Process of maintaining a constant internal environment is known as homeostasis . Reason : Kidneys are excretory and homeostatic organs.

    Assertion: Human kidney is retroperitoneal in position, Reason: Human kidney lies outside the peritoneal cavity.

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