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Excretory Products and their Elimination · Question 41

AIPMT 2009MCQMedium📈 Topic in 0% papers+4−1
1

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

Answer

(1) Micturition will continue

Solution

As per NCERT, urine formed by the nephrons is stored in the urinary bladder till a voluntary signal is given by the CNS. This signal is initiated by the stretching of the urinary bladder as it gets filled with urine; in response, the stretch receptors on the bladder wall send signals to the CNS, which passes on motor messages to contract the bladder muscles and relax the urethral sphincter (micturition reflex).

Urine production by the kidneys does not depend on these receptors, so urine keeps reaching the bladder.

If the stretch receptors are totally removed, the CNS no longer receives information about bladder filling, so the voluntary control (holding and timing) of urination is lost.

Urine is not retained under control; it keeps on being passed out, i.e., micturition will continue (uncontrolled).

Answer: (1)

AIPMT 2009

Keep practising — Excretory Products and their Elimination

2

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

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

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
4

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
5

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
6

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
7

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
8

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
9

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
10

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
11

Conversion of ammonia to urea is done by

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

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