PYQSide ExamsMy practice

Breathing and Exchange of Gases · Question 48

AIPMT 2004MCQEasy📈 Topic in 12% papers+4−1
1

When CO2 concentration in blood increases breathing becomes

  1. shallower and slow
  2. there is no effect on breathing
  3. slow and deep
  4. faster and deeper

Answer

(4) faster and deeper

Solution

As per NCERT, a chemosensitive area situated adjacent to the rhythm centre is highly sensitive to CO2 and hydrogen ions.

⇒ An increase in these substances activates this centre, which signals the rhythm centre to make the necessary adjustments in the respiratory process so that these substances can be eliminated.

⇒ To remove the excess CO2, the rate and depth of breathing both increase.

∴ Breathing becomes faster and deeper.

Answer: (4)

AIPMT 2004

Keep practising — Breathing and Exchange of Gases

2

Given below are four matchings of an animal and its kind of respiratory organ: The correct matchings are

  1. (A) and (B)
  2. (A), (B) and (C)
  3. (B) and (D)
  4. (C) and (D).
AIPMT 2003

All Breathing and Exchange of Gases PYQs →

PDFDownload Breathing and Exchange of Gases PYQs as PDF Free, with answer key and a QR code to every solution — print it or study offline⬇
All NEET Zoology chapters
Class 11Animal KingdomStructural Organisation in AnimalsBiomolecules (Biology)Digestion and AbsorptionBreathing and Exchange of GasesBody Fluids and CirculationExcretory Products and their EliminationLocomotion and MovementNeural Control and CoordinationChemical Coordination and Integration
Class 12Human ReproductionReproductive HealthEvolutionHuman Health and DiseaseBiotechnology: Principles and ProcessesBiotechnology and its ApplicationsBiology Experimental Skills