#Question id: 11079
#Unit 7. System Physiology – Animal
The diffusing capacity of a gas is the volume of gas that will diffuse through a membrane each minute for a pressure difference of 1 mm Hg. Which of the following gases is often used to estimate the oxygen diffusing capacity of the lungs?
#Question id: 11080
#Unit 7. System Physiology – Animal
The O2-CO2 diagram here shows a ventilation-perfusion
ratio line for the normal lung. Which of the following best describes the
effect of decreasing ventilation-perfusion ratio on the alveolar Po2 and Pco2?
#Question id: 11081
#Unit 7. System Physiology – Animal
In which of the following conditions is alveolar Po2 increased and alveolar Pco2 decreased?
#Question id: 11082
#Unit 7. System Physiology – Animal
A 67-year-old man has a solid tumor that pushes
against an airway partially obstructing air flow to the distal alveoli. Which
point on the ventilation-perfusion line of the O2-CO2 diagram corresponds to
the alveolar gas of these distal alveoli?
#Question id: 11083
#Unit 7. System Physiology – Animal
A 55-year-old male has a pulmonary embolism that
partially blocks the blood flow to his right lung. Which point on the
ventilation-perfusion line of the O2-CO2 diagram corresponds to the alveolar
gas of his right lung?
#Question id: 11084
#Unit 7. System Physiology – Animal
The next diagram shows two lung units (S and T) with their blood supplies. Lung unit S has an ideal relationship between blood flow and ventilation. Lung unit T has a comprised blood flow. What is the relationship between alveolar dead space (DALV), physiologic dead space (DPHY) and anatomic dead space (DANAT) for these lung units?
