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Tidal Volume

During exhala...

Question

During exhalation, air rushes out of the lungs as atmospheric air pressure is ___ than the air pressure in the lungs.

A

higher

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B

marginally high

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C

lower

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D

the same

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Solution

The correct option is C
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Q. Fill in the blanks.

a. Breathing involves two stages:
......1...... during which atmospheric air is drawn in and
......2...... by which alveolar air is released out.

b. The movement of air into and out of the lungs is carried out by ......3...... gradient between the lungs and the atmosphere.

c. Inspiration can occur if the pressure within lungs is ....4.... than the atmospheric pressure i.e., there is a ....5..... pressure in the lungs with respect to atmospheric pressure.

d. Expiration takes place when the intrapulmonary pressure is ....6.... than atmospheric pressure.

Q. Assertion :Inspiration occurs when there is a negative pressure in the lungs with respect to the atmospheric pressure. Reason: During inspiration, a decrease in pulmonary volume increases the intra-pulmonary pressure than atmospheric pressure which forces the air from outside to move into the lungs.

Atmospheric air rushes in through trachea into the lungs due to ___.

Air moves out of the lungs when the pressure inside the lungs is

Why is there a resedual amount of air left in the lungs during exhaling???😉

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