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Excretory Products and their Elimination · Question 46

AIPMT 2005MCQEasy📈 Topic in 25% papers+4−1
1

In ornithine cycle, which of the following wastes are removed from the blood?

  1. CO2 and urea
  2. Ammonia and urea
  3. CO2 and ammonia
  4. Urea and urine

Answer

(3) CO2 and ammonia

Solution

As per NCERT, ammonia produced by metabolism is converted into urea in the liver of ureotelic animals.

This conversion occurs through the ornithine (urea) cycle:

2NH3 + CO2 NH2CONH2 + H2O

⇒ Toxic ammonia and CO2 are taken up from the blood and used to make urea, which is then released into the blood.

∴ CO2 and ammonia are removed from the blood.

Answer: (3)

AIPMT 2005

Keep practising — Excretory Products and their Elimination

2

The net pressure gradient that causes the fluid to filter out of the glomeruli into the capsule is

  1. 50 mm Hg
  2. 75 mm Hg
  3. 20 mm Hg
  4. 30 mm Hg
AIPMT 2005
3

A person is undergoing prolonged fasting. His urine will be found to contain abnormal quantities of

  1. fats
  2. amino acids
  3. glucose
  4. ketones.
AIPMT 2005
4

Uricotelism is found in

  1. mammals and birds
  2. fish and fresh water protozoans
  3. birds, land reptiles and insects
  4. frogs and toads
AIPMT 2004
5

If Henle's loop were absent from mammalian nephron, which one of the following is to be expected?

  1. There will be no urine formation.
  2. There will be hardly any change in the quality and quantity of urine formed.
  3. The urine will be more concentrated.
  4. The urine will be more dilute.
AIPMT 2003
6

Conversion of ammonia to urea is done by

  1. ornithine cycle
  2. arginine cycle
  3. fumaric cycle
  4. citrulline cycle
AIPMT 2000
7

Concentration of urine depends upon which organ?

  1. Bowman's capsule
  2. Length of Henle's loop
  3. PCT
  4. Network of capillaries arising from glomerulus
AIPMT 2000
8

Which pair is correct?

  1. Sebum = sexual attraction
  2. Saliva = sense of food taste
  3. Sweat = temperature regulation
  4. Humerus = Hind leg
AIPMT 2000

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