The direct motivation for lung ventilation comes from A: lung contraction B: elastic retraction of the lungs C: relief and contraction of respiratory muscles D: intrapulmonary pressure and atmosphere pressure difference

When the diaphragm and external intercostals muscles contract, which<br/>of the following actions does NOT occur ____? A: Air moves into the lung B: The intrapleural pressure increases C: The diaphragm moves inferiorly D: The intrapulmonary pressure decreases