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

Question

Quizplus · Accepted Answer

Inspiration occurs due to an increase in the size of the thorax and a decrease in intrapleural pressure.
The rib cage lengthens,not shortens.
The size of the thorax increases,not decreases.
Intrapleural pressure decreases,not increases.

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