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STD 11 - 14. Breathing and exchange in gases — BIOLOGY STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceBIOLOGYSTD 11 - 14. Breathing and exchange in gases1 Mark
MCQ
Tidal volume is
  • ✓
    Volume of air inspired or expired
  • B
    Additional volume of air, a person can inspire by a forcible inspiration
  • C
    Additional volume of air, a person can expire by a forcible expiration
  • D
    Remaining volume of air in the lungs even after a forcible expiration
✓

Answer

Correct option: A.
Volume of air inspired or expired
a
Volume of the air inspired or expired. Pulmonary volume is the volume of air present in the lungs it is divided into four different types according to the volume of air present in the lungs
$(i)$ Tidal Volume ($TV$) The volume of the air inspired or expired involuntarily in each normal breath. It is about $500\; mL$ of air in average young adult man
$(ii)$ Inspiratory Reserve Volume ($IRV$) The maximum volume of the air, which a person can inhale over and above tidal volume by deepest, possible voluntary inspiration. It is about $3000\; mL$
$(iii)$ Expiratory Reserve Volume ($ERV$) The volume of the air which can be expired over and above the tidal volume with maximum effort. It is about $1100\; mL$
$(iv)$ Residual Volume ($RV$) The volume of the air left in the lungs even after the maximum forceful expiration. It is about $1200\; mL$
diffusion are some important factors that affects the rate of diffusion

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