# IGCSE Biology Paper-2: Specimen Questions with Answers 130 - 130 of 203

## Question 130

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### Question

MCQ▾

Tidal volume in human beings is

Choice (4)
a.500 ml
b.800 ml
c.1200 ml
d.1500 ml

a.

### Explanation

Measurement of volume of inspired and expired air by the help of Spirometer instrument.

Tidal Volume (TV)

Volume of air, which is inspired or expired in normal breathing. It is 500 ml.

Inspiratory reserve volume (IRV)

Volume of air, which inspired forceful beyond Tidal volume. It is 3000 ml

Expiratory reserve volume (ERV)

Volume of air, which expired forcefully beyond Tidal volume. It is 1100 ml

Residual volume (RV)

• Volume of air, which always remain in lungs after forceful expiration. It cannot expired in any condition.
• It is 1200 ml. So, Functional residual volume is ERV + RV = 2300 ml

Vital capacity of lungs (VC)

Volume of air, which expired forcefully after forceful inspiration.

Vital capacity

Inspiratory Capacity (IC): IRV + TV

Functional Residual Capacity (FRC)

Volume of air that will remain in the lungs after a normal expiration. This includes ERV + RV

Total capacity of lungs

Volume of air, which can be filled in lungs.

Total capacity