If a lung is punctured in a car accident, that lobe fails to inflate even though there is no obstruction of the air passageway to that lobe. Why?

A) The trauma must have damaged the nerve path controlling ribs on that side of the lung.
B) Negative feedback prevents the ribs and diaphragm on that side from causing pain.
C) When the chest volume expands, air can now rush in through the puncture without filling the alveoli.
D) Mucus or blood must be filling the lobe.
E) Stimulation of stretch receptors in the alveolar walls initiate inhibitory nerve impulses.

Question

Elisha Chopra · Accepted Answer

Final Answer : C, Explanation :  When the chest volume expands, air can now rush in through the puncture without filling the alveoli, preventing the lobe from inflating properly. This is because the negative pressure that normally helps inflate the lung is disrupted by the outside air entering through the puncture.

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