The abdominal muscles can actually contribute to inspiration by contraction at the end of exhalation.

Question

Quizplus · Accepted Answer

This statement is true. The contraction of the abdominal muscles at the end of exhalation, which is also known as forced exhalation, increases the pressure in the abdominal cavity and can help to push the diaphragm upwards, thereby increasing the volume of the thoracic cavity, and contributing to inspiration.

The Abdominal Muscles Can Actually Contribute to Inspiration by Contraction