Question

If the respiratory rate of 'A' is 35 breaths/min and tidal volume 185 cc/breath and of 'B' is 25 breaths/min and tidal volume 29 cc/breath then

• A. Pulmonary ventilation of 'A' and 'B' is same.
• B. Alveolar ventilation of'A' and 'B' is same.
• C. Pulmonary ventilation of 'A' is greater than 'B'.
• D. Alveolar ventilation of 'A' is greater than 'B'.

Answer 1

Answer: (C)

Pulmonary ventilation of 'A' is greater than 'B'.

Pulmonary ventilation is commonly referred to as breathing. It is the process of air flowing into the lungs during inspiration (inhalation) and out of the lungs during expiration (exhalation).

Pulmonary Ventilation = (Tidal Volume - Dead Space) * Respiratory Rate.

In the given question, A has a more respiratory rate as well as tidal volume than B.