I. Intra pulmonary pressure remains less than the atmospheric pressure II. There is negative pressure in the lungs than the atmospheric pressure In which of the above two situations inspiration takes place? Choose the correct option accordingly? |
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a) |
Only I |
b) |
Only II |
c) |
Both I and II |
d) |
I or II |
I. Intra pulmonary pressure remains less than the atmospheric pressure II. There is negative pressure in the lungs than the atmospheric pressure In which of the above two situations inspiration takes place? Choose the correct option accordingly? |
|||||||
a) |
Only I |
b) |
Only II |
c) |
Both I and II |
d) |
I or II |
(c)
Both I and II.
The movement of the air into and out of the lungs is carried out by creating a pressure gradient between the lungs and the atmosphere. Inspiration can occur if the pressure within the lungs (intra pulmonary pressure) is less than the atmospheric pressure, i.e., there is a negative pressure in the lungs with respect to the atmospheric pressure.
Expiration takes place when the intra pulmonary pressure is higher than the atmospheric pressure, i.e., there is positive pressure in the lungs with respect to the atmospheric pressure