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Fill in the blanks : Breathing involv...

Fill in the blanks :
Breathing involves two stages. ...1... dunng vyhlc atmospheric airs drawn in and ...2... explratxon by which alveolar air is relesed 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 atmosphere pressure i.e., there is a ...5...pressure in the lungs with respect to atmospheric pressure.
d. Expiration takes place when the intra pulmonary pressure is ...6... than atmospheric pressure.

A

l-expiration, 2-snspiration, 3-concentration, 4-lower, 5-positive, 6-higher

B

l-inspiration, 2-expiration, 3-pressure, 4- higher, 5-positive, 6-lower

C

l-inspiration, 2-expiration, 3-pressure, 4-higher, 5-negative, 6-lower

D

l-inspiration, 2-expiration, 3-pressure, 4-lower, 5-negative, 6-higher

Text Solution

Verified by Experts

The correct Answer is:
D
a. Breathing involves two stages: inspiration during which atmospheric air is drawn in and expiration by which alveolar air is released out.
b. The movement of air into and out of the lungs is carried out by pressure gradient between the lungs and the atmosphere.
c. Inspiration lcan occur if the pressure within lungs is lower than the atmosphere pressure, i.e. there is a negative pressure in the lungs with respect to atmospheric pressure.
d. Expiration takes place when the intra-pulmonary pressure is higher than atmospheric pressure.
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Knowledge Check

  • Inspiration occurs when there is a negative pressure in the lungs with respect to atmospheric pressure. This negative pressure is achieved when

    A
    intrapulmonary pressure is less than the atmospheric pressure
    B
    Intrapulmonary pressure is greater than the atmospheric pressure
    C
    intrapulmonary pressure is equal to the atmospheric pressure
    D
    intrapleural pressure becomes more than the intra-alveolar pressure.

  • The process by which O_(2) rich atmospheric air is drawn in and CO_(2) rich alveolar air is released out is

    A
    Breathing
    B
    Pulmonary ventilation
    C
    Cellular respiration
    D
    Both A and B

  • Movement of air due to atmospheric pressure is called

    A
    wind
    B
    air current
    C
    cyclone
    D
    none of the above

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