6. Which of the following statements is correct during inhalation?
(A) The diaphragm relaxes and rises, and the pressure in the alveoli is higher than atmospheric pressure.
(B) The diaphragm relaxes and descends, and the pressure in the alveoli is lower than atmospheric pressure.
(C) The diaphragm contracts and rises, and the pressure in the alveoli is higher than atmospheric pressure.
(D) The diaphragm contracts and descends, and the pressure in the alveoli is lower than atmospheric pressure.
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統計: A(0), B(7), C(3), D(9), E(0) #3425975
統計: A(0), B(7), C(3), D(9), E(0) #3425975