A(n) __________ in the volume of the thoracic cavity _________ the intra-alveolar pressure, which causes __________.
A)increase; decreases; expiration
B)increase; increases; inspiration
C)increase; decreases; inspiration
D)decrease; decreases; expiration

Question

Quizplus · Accepted Answer

An increase in the volume of the thoracic cavity decreases the intra-alveolar pressure, which causes inspiration. This is because when the volume of the thoracic cavity increases, the lungs expand and the pressure inside the lungs decreases. This decrease in pressure causes air to flow in from the higher pressure outside the body, resulting in inspiration. Conversely, a decrease in the volume of the thoracic cavity would increase intra-alveolar pressure, leading to expiration. Option A is incorrect because an increase in volume would not lead to expiration. Option B is incorrect because an increase in thoracic cavity would lead to a decrease in intra-alveolar pressure and not an increase. Option D is incorrect because a decrease in thoracic cavity volume would lead to an increase in intra-alveolar pressure and not a decrease.

A(n) __________ in the Volume of the Thoracic Cavity _________

A(n) __ in the Volume of the Thoracic Cavity _