During inspiration (a.k.a.inhalation)of air into the lung of a mammal
A)the chest cavity has a positive pressure.
B)the diaphragm moves upward.
C)the diaphragm contracts.
D)the rib cage moves down.
E)the intercostal muscles relax.

Question

Quizplus · Accepted Answer

During inspiration, the diaphragm contracts and moves downward, increasing the volume of the chest cavity and causing a decrease in pressure. This decrease in pressure allows air to flow into the lungs. None of the other choices accurately describe the process of inspiration.

During Inspiration (A