Which of the following events occurs last?
A) contraction of the diaphragm and the intercostals
B) movement of air into the lungs
C) firing of the inspiratory neurons in the medulla
D) firing of the phrenic and intercostal nerves

Question

Quizplus · Accepted Answer

The firing of the inspiratory neurons stimulates the phrenic and intercostal nerves,which causes contraction of the respiratory muscles (the diaphragm and intercostals).Contraction of the respiratory muscles increases thoracic volume,thereby moving air into the lungs.

Which of the Following Events Occurs Last