Sign in
12thPass logo
New chatPYQ LibraryDoubtsRank report
Sign in to see Recents

Your guest activity stays on this device

Sign in to save progress →
Sign in

Breathing and Exchange of Gases question

2015 · Q4
Guest · filters and generic practice availableBrowsing as a guest · PYQ filters and generic practice are available. Sign in only for personalised features and saved progress.
  1. PYQ Library
  2. /NEET
  3. /Biology
  4. /Breathing and Exchange of Gases
  5. /2015 · Q4

Breathing and Exchange of Gases question

2015 · Q4

NEETBiologyBreathing and Exchange of GasesMCQ+4 / −1
When you hold your breath, which of the following gas changes in blood would first lead to the urge to breathe?
  1. A
    Falling CO2 concentration
  2. B
    Rising CO2 and falling O2 concentration
  3. C
    Falling O2 concentration
  4. D
    Rising CO2 concentration
View written solutionFree

Correct answer: D

Excess CO2 mainly stimulates the respiratory centre of the brain and increases the inspiratory and expiratory signals to the respiratory muscles. O2 does not have a significant direct effect on the respiratory centre of the brain in controlling respiration.

PreviousNext

More from Breathing and Exchange of Gases

  • Approximately seventy percent of carbon-dioxide absorbed by the blood will be transported to the lungs2014 · MCQ
  • The figure shows a diagrammatic view of human respiratory system with labels A, B, C and D. Select the option which gives correct identification and main function and / or characteristic. Includes diagram2013 · MCQ
  • Which one of the following is the correct statement for respiration in humans?2012 · MCQ
  • People who have migrated from the planes to an area adjoining Rohtang Pass about six months back2012 · MCQ
  • Bulk of carbon dioxide (CO2) released from body tissues into the blood is present as2011 · MCQ
  • Which one of the following is a possibility for most of us in regard to breathing, by making a conscious effort?2011 · MCQ
  • A large proportion of oxygen remains unused in the human blood even after its uptake by the body tissues. This O22011 · MCQ
  • The figure given below shows a small part of human lung where exchange of gases takes place. Select the option which represents labelled part (A, B, C or D) correctly identified along with its function. Includes diagram2011 · MCQ