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Midterm_2015_solution.pdf - ! ! ! BME 121 ! Quantitative...

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BME 121Quantitative Physiology: Organ Transport SystemsMidterm ExamWinter 2015February 12thName: _______________________________ID #:_______________________________I attest that I am registered for this course and am the person listed above.Signature: ____________________________1
1. True or False with short answer justification (20 points, 4 points each)Read each question carefully, answer true or false (1 point), AND justify answer in 1-2sentences (3 points)A.The lung diffusing capacity (DL) for a gas such as oxygen is a “lumped” parameterdescribing the conductance out of the lungs, and depends ONLY on the properties ofthe airway wall.
B.Lung recoil can primarily be attributed to alveolar surface tension whether surfactant ispresent or not.
C.In the lung airways, air is heated and humidified to saturation. The addition of a newpartial pressure from water vapor (PH20,sat) results in increased total pressure and aresulting increase in the partial pressures for the other gases (since partial pressure Pi=niP).

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Epithelial tissue

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