Numerical Problems/ISC/Class 11
Created by Titas Mallick
Biology Teacher • M.Sc. Botany • B.Ed. • CTET (CBSE) • CISCE Examiner
Created by Titas Mallick
Biology Teacher • M.Sc. Botany • B.Ed. • CTET (CBSE) • CISCE Examiner
Numerical Problems - Breathing and Exchange of Gases
A person breathes 16 times per minute, and their tidal volume is 500 mL. Calculate their minute ventilation.
Solution:
Minute ventilation is the total volume of air inhaled or exhaled per minute. It is calculated by multiplying the tidal volume by the respiratory rate.
Minute Ventilation = Tidal Volume x Respiratory Rate Minute Ventilation = 0.5 L/breath * 16 breaths/minute Minute Ventilation = 8 L/minute
Therefore, the person's minute ventilation is 8 liters per minute.
Given the following lung volumes for an individual:
Calculate the Vital Capacity (VC) of this individual.
Solution:
Vital Capacity (VC) is the maximum volume of air a person can breathe out after a forced inspiration. It is the sum of Tidal Volume, Inspiratory Reserve Volume, and Expiratory Reserve Volume.
Vital Capacity (VC) = TV + IRV + ERV Vital Capacity (VC) = 500 mL + 3000 mL + 1000 mL Vital Capacity (VC) = 4500 mL
Therefore, the vital capacity of this individual is 4500 mL or 4.5 liters.
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