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Excretory Products and their Elimination

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CBSE Gujarat Board Haryana Board

## Previous Year Papers

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Class 10 Class 12
Explain why :
Mammals are ureotelic, but birds are obliged to be uricotelic.

Mammals normally get required amount of water. Urea present in water can be stored in the urinary bladder that does not disturb the metabolism of the body. Birds are uricotelic as water is not easily available in excess. Urinary bladder is absent in birds and ureters open into cloaca also absorbs water. The body of bird must be kept light for the flight mechanism thus the presence of water will be disadvantageous for them. Thus they are uricotelic as uric acid is concentrated while urea needs more amount of water to dissolve,
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What is glomerulonephritis ?

Glomerulonephritis is the inflammation of glomeruli of the kidney.
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Name three uricotelic animals.

The uricotelic animals are
1. Birds
2. Reptiles
3. Insects

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What is uremia ?

Uremia is the accumulation of urea in the blood due to the malfunctioning of the kidneys. The urea accumulation is harmful and may lead to kidney failure.

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What is the ultimate method for the correction of acute renal failure?

Kidney transplant.
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What is Bowman's capsule?

The double walled cup like structure present at the starting of the renal tubule is Bowman's capsule. It encloses the glomerulus capsule.
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