AIIMS2010ZoologyBreathing and Exchange of Gases
Chemosensitive area of respiratory centre in medulla is affected by
Options
- Aless CO ₂ and H ⁺ ions
- Bless O ₂ and H ⁺ ions
- Cexcess CO ₂ and H ⁺ ions
- Dexcess O ₂ and H ⁺ ions.
Correct answer
C. excess CO ₂ and H ⁺ ions
Step-by-step solution
Human beings have a significant ability to maintain and moderate the respiratory rhythm to suit the demands of the body tissues. A specialised centre present in the medulla region of the brain called respiratory rhythm centre is primarily responsible for this regulation. A chemosensitive area is situated adjacent to the rhythm centre which is highly sensitive to CO ₂ and hydrogen ions. Increase in these substances can activate this centre, which in turn can signal the rhythm centre to make necessary adjustments in