Regional factors affecting the distribution of gas in the normal lung result in which of the fol-lowing?
a. More ventilation goes to the apexes and lung periphery.
b. More ventilation goes to the apexes and lung core.
c. More ventilation goes to the bases and lung core.
d. More ventilation goes to the bases and lung periphery.
ANS: D
In upright individuals, these factors direct more ventilation to the bases and periphery of the lungs.
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