MEDICINE MCQ
RESPIRATORY MEDICINE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Alveoli would collapse.
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Bronchi would collapse.
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Vocal cords would not vibrate.
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Epiglottis would close.
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Detailed explanation-1: -Without normal surfactant, the tissue surrounding the air sacs in the lungs (the alveoli) sticks together (because of a force called surface tension) after exhalation, causing the alveoli to collapse.
Detailed explanation-2: -Because the alveoli of the lungs are highly elastic, they do not resist surface tension on their own, which allows the force of that surface tension to deflate the alveoli as air is forced out during exhalation by the contraction of the pleural cavity.
Detailed explanation-3: -3) Surfactant helps keep the alveoli relatively “dry”-a high surface tension would suck fluid away from the alveolar walls into the alveolar space but with the decreased surface tension provided by surfactant, the alveolar space is maintained in a “relatively dry state” (ie.