What pressures determine the direction of airflow within the respiratory tract?
A) The intratracheal pressure and intrapulmonary pressure
B) The sinus cavity pressures and the intrapulmonary pressure
C) The sinus cavity pressures and the atmospheric pressure
D) The intrapleural pressure and the intrapulmonary pressure
E) The intrapulmonary pressure and the atmospheric pressure
Answer: E
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Fill in the blank(s) with the appropriate word(s)