True or false (please explain so I can understand as well) a. Surface tension accounts for about half of the lung "elastic recoil pressure". b. Assume that small airway pressure is equal to 10 cm H20, and pleural pressure is 20 cmH20. Under these conditions, dynamic compression of the airways will occur. c. When the lung is deflated to residual volume, the transpulmonary pressure is positive. d. The nitrogen washout method is typically used to measure physiologic dead space. e. The total pulmonary ventilation rate can be calculated as follows: f. Total ventilation rate = [tidal volume + alveolar volume] x breathing frequency