Question

A person suffers punctures in his chest cavity in an accident without any damage to the lungs. Its effect could be

• A. Cessation of breathing
• B. Rapid increase in breathing rate
• C. No change in respiration
• D. Reduced breathing rate

Answer 1

The correct option is A Cessation of breathing

Diffusion of gases during breathing :

Diffusion of gases in our lungs involves their passive (without use of energy) movement from a region of their higher partial pressure to a region of lower partial pressure.

Punctures in chest cavity :

Puncture in the chest cavity (thoracic cavity) leads to the elimination of the pressure gradient which is essential for breathing due to which breathing would cease.

Final answer : d. Cessation of breathing