#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?
#Question id: 11085
#Unit 7. System Physiology – Animal
The diagrams show changes in the partial pressures
of oxygen and carbon dioxide as blood flows from the arterial end to the venous
of the pulmonary capillaries. Which diagram best depicts the normal relationship
between Po2 (red line) and Pco2 (green line) during resting conditions?