What happens when the pressure within t...

What happens when the pressure within the pulmonary cavity is more than the atmospheric air ?

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Expulsion of air from the lungs occurs.

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What happens when pressure within the pulmonary cavity is higher than the atmospheric pressure?

Consider the following four statements (a-d) and select the option which includes all the correct ones only :- (a) All the time of inspiration , contracion in diaphragm and external intercostal muscles take place. (b) Normal breathing is also called as abdominal breathing. (c ) Expiration during sneezing, coughing, yoga is normal expiratio during which IICM and abdominal muscles relax. (d) Inspiration can occur if the pressure within lungs (intra pulmonary pressure) is more than the atmospheric pressure.

Read the following statement (A - D). (A) The movement of air into and out of the lungs is carried out by creating a pressure gradient between the lungs and atmosphere. (B) Inspiration can occur if the pressure within the lungs is more than the atmospheric pressure. (C) Expiration takes place when the intrapulmonary pressure is lesser than the atmospheric pressure. (D) The diaphragm and a specialized set of intercostal muscles in between the ribs help in the generation of such pressure gradients for breathing. How many of the following statements are correct?

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