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Excretory Products and their Elimination · Question 39

AIPMT 2010 (Prelims)MCQEasy📈 Topic in 50% papers+4−1
1

Which one of the following statements in regard to the excretion by the human kidneys is correct?

  1. Descending limb of loop of Henle is impermeable to water.
  2. Distal convoluted tubule is incapable of reabsorbing HCO3-.
  3. Nearly 99 per cent of the glomerular filtrate is reabsorbed by the renal tubules.
  4. Ascending limb of loop of Henle is impermeable to electrolytes.

Answer

(3) Nearly 99 per cent of the glomerular filtrate is reabsorbed by the renal tubules.

Solution

As per NCERT, about 180 L of glomerular filtrate is formed per day but only about 1.5 L of urine is released, i.e., nearly 99 per cent of the filtrate is reabsorbed by the renal tubules. ⇒ Option (3) is correct.

⇒ The descending limb of the loop of Henle is permeable to water but almost impermeable to electrolytes. ⇒ Option (1) is wrong.

⇒ The ascending limb is impermeable to water but allows transport of electrolytes. ⇒ Option (4) is wrong.

⇒ The DCT reabsorbs Na+, water and HCO3- conditionally. ⇒ Option (2) is wrong.

Answer: (3)

AIPMT 2010 (Prelims)

Keep practising — Excretory Products and their Elimination

2

The principal nitrogenous excretory compound in humans is synthesised

  1. in kidneys but eliminated mostly through liver
  2. in kidneys as well as eliminated by kidneys
  3. in liver and also eliminated by the same through bile
  4. in the liver, but eliminated mostly through kidneys
AIPMT 2010 (Prelims)
3

What will happen if the stretch receptors of the urinary bladder wall are totally removed?

  1. Micturition will continue
  2. Urine will continue to collect normally in the bladder
  3. There will be no micturition
  4. Urine will not collect in the bladder
AIPMT 2009
4

Uric acid is the chief nitrogenous component of the excretory products of

  1. earthworm
  2. cockroach
  3. frog
  4. man.
AIPMT 2009
5

A person who is on a long hunger strike and is surviving only on water, will have

  1. less amino acids in his urine
  2. more glucose in his blood
  3. less urea in his urine
  4. more sodium in his urine
AIPMT 2007
6

Angiotensinogen is a protein produced and secreted by

  1. juxtaglomerular (JG) cells
  2. macula densa cells
  3. endothelial cells (cells lining the blood vessels)
  4. liver cells.
AIPMT 2006
7

Earthworms are -

  1. Uricotelic when plenty of water is available
  2. Ammonotelic when plenty of water is available
  3. Ureotelic when plenty of water is available
  4. Uricotelic under conditions of water scarcity
AIPMT 2006
8

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
AIPMT 2005
9

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
10

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
11

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

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