Question

which of the following is not involved in inspiration?
multiple choice
movement of the sternum anteriorly
elastic recoil of the lungs
contraction of the diaphragm
elevation of the ribs

Explanation:

During inspiration (inhalation), the diaphragm contracts (flattens), the ribs are elevated (due to external intercostal muscle contraction), and the sternum moves anteriorly. These actions increase the thoracic cavity volume. Elastic recoil of the lungs is involved in expiration (exhalation) as it helps the lungs return to their original shape and expel air.

Answer:

Elastic recoil of the lungs