MEDICAL
LUNGS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The more surfactant we have the more we are able to expand our lungs, so GREATER compliance.
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The less surfactant we have the more we are able to expand our lungs, so GREATER compliance.
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Either A or B
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None of the above
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Detailed explanation-1: -Answer and Explanation: The correct answer is c. Compliance is proportional to surfactant and inversely proportional to surface tension. Lung compliance: The term lung compliance explains the ability of the lungs to contract and expand to allow the movement of air inside and outside of the lungs.
Detailed explanation-2: -Which of the following statements is true about surfactant? Surfactant is secreted by type I alveolar cells. Lack of surfactant increases compliance of the lungs. Surfactant equalizes surface tension between large and small alveoli.
Detailed explanation-3: -The incorrect statement is c. Surfactant increases lung compliance by increasing the surface tension of the alveoli. Surfactant is a surface-active agent in water secreted by type II alveolar epithelial cells. It greatly reduces the surface tension of water.
Detailed explanation-4: -A high lung compliance means that the lungs are too pliable and have a lower than normal level of elastic recoil. This indicates that little pressure difference in pleural pressure is needed to change the volume of the lungs.