During Inspiration,muscular Contraction of the Diaphragm Causes Air to Move

question 27

Multiple Choice

During inspiration,muscular contraction of the diaphragm causes air to move into the lung.The mechanisms that drive air movement during inspiration are a(n) :

• A) Decrease in intra-alveolar pressure and shortening of the rib cage
• B) Decrease in the size of the thorax and alveolar expansion
• C) Increase in the size of the thorax and a decrease in intrapleural pressure
• D) Increase in atmospheric pressure and intrapleural pressure

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