Air moves into the lungs when

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(B) Air moves into the lungs during inspiration (inhalation).Inspiration occurs when the pressure within the lungs (intra-pulmonary pressure) is less

Vedclass · Accepted Answer

Atmospheric pressure is greater than pressure within the lungs

Vedclass · Answer

(B) Air moves into the lungs during inspiration (inhalation).Inspiration occurs when the pressure within the lungs (intra-pulmonary pressure) is less than the atmospheric pressure.This pressure gradient is created by the contraction of the diaphragm and external intercostal muscles,which increases the volume of the thoracic cavity.According to Boyle's Law,an increase in volume leads to a decrease in pressure,causing air to flow from the high-pressure atmosphere into the low-pressure lungs.

Similar Questions

Hiccups are caused by the activity of which of the following?

Explain the mechanism of breathing.

Explain the mechanism of expiration.

Assertion : Inspiration occurs due to muscular relaxation.
Reason : During inspiration,the diaphragm and external intercostal muscle contract simultaneously.

Arrange the given steps of expiration in the sequence of events occurring first:
$I.$ Relaxation of the diaphragm and sternum
$II.$ Reduction of the pulmonary volume
$III.$ Expulsion of air from the lungs
$IV.$ Increase in intra-pulmonary pressure
Choose the correct option.

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