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  4. If a person suffers punctures in his chest cavity in an accident, without any damage to the lungs, its effect could lead to

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Q. If a person suffers punctures in his chest cavity in an accident, without any damage to the lungs, its effect could lead to

NTA AbhyasNTA Abhyas 2020Breathing and Exchange of Gases

Solution:

Inhalation and Exhalation is due to pressure gradient. This is difference in the pressure which causes air to flow. During inhalation negative pressure gradient and during exhalation positive pressure gradient is formed. Thus if a person suffers from punctures inside the chest cavity, the pressure gradients will not be formed and thus breathing will stop.