BIO 202 MIDTERM- RESPIRATORY
SYSTEM (WEEK 4) QUESTIONS WITH
CORRECT ANSWERS 2025
What determines the direction of gas movement? - CORRECT ANSWER -partial pressure differences
The net diffusion of oxygen out of the blood occurs during which phase? - CORRECT ANSWER -
Internal respiration
True/False? At the venous end of systemic capillaries, there is no net movement of O2 and CO2 -
CORRECT ANSWER -True
Which direction do gases diffuse at the arterial end of the pulmonary capillaries? - CORRECT ANSWER -
O2 diffuses from the alveoli into the blood, while CO2 diffuses from the blood into the alveoli.
Where in the lungs does gas exchange take place? - CORRECT ANSWER -
Gas exchange occurs between the alveoli and the blood
If intrapulmonary (intra-
alveolar) pressure was 760 mm Hg, what would you expect the intrapleural pressure to be? -
CORRECT ANSWER -756 mmHg
Respiratory gases cross the respiratory membrane by - CORRECT ANSWER -Simple diffusion
Which environment would have the highest oxygen partial pressure? - CORRECT ANSWER -alveolar air
Surfactant is produced by -RCORRECT ANSWER -Type II pneumocytes
Increased production of surfactant would - CORRECT ANSWER -
result in an increase in the thickness of the respiratory membrane, which would decrease diffusion of re
spiratory gases.
SYSTEM (WEEK 4) QUESTIONS WITH
CORRECT ANSWERS 2025
What determines the direction of gas movement? - CORRECT ANSWER -partial pressure differences
The net diffusion of oxygen out of the blood occurs during which phase? - CORRECT ANSWER -
Internal respiration
True/False? At the venous end of systemic capillaries, there is no net movement of O2 and CO2 -
CORRECT ANSWER -True
Which direction do gases diffuse at the arterial end of the pulmonary capillaries? - CORRECT ANSWER -
O2 diffuses from the alveoli into the blood, while CO2 diffuses from the blood into the alveoli.
Where in the lungs does gas exchange take place? - CORRECT ANSWER -
Gas exchange occurs between the alveoli and the blood
If intrapulmonary (intra-
alveolar) pressure was 760 mm Hg, what would you expect the intrapleural pressure to be? -
CORRECT ANSWER -756 mmHg
Respiratory gases cross the respiratory membrane by - CORRECT ANSWER -Simple diffusion
Which environment would have the highest oxygen partial pressure? - CORRECT ANSWER -alveolar air
Surfactant is produced by -RCORRECT ANSWER -Type II pneumocytes
Increased production of surfactant would - CORRECT ANSWER -
result in an increase in the thickness of the respiratory membrane, which would decrease diffusion of re
spiratory gases.
