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MODEL PAPER 3 — BIOLOGY STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceBIOLOGYMODEL PAPER 31 Mark
MCQ
The specialized centre which can reduce the inspiratory duration upon stimulation is ________.
  • A
    Pneumotaxic centre
  • B
    Chemosensitivecentre
  • C
    Apneusticcentre
  • D
    Medullary inspiratory centre
✓

Answer

(a) Pneumotaxic centre
Explanation: The pneumotaxic centre can moderate the functions of the respiratory rhythm centre. A neural signal from this centre can reduce the duration of inspiration and thereby alter the respiratory rate.

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