Answer: False
When the diaphragm
contracts, the muscles will also contract and pull upward and increase the size
of the thoracic cavity thus decreases air pressure inside during inspiration. After
the diaphragm contracts, it goes to relaxation, the muscles will also relaxed. It
gets looser and return to its original position higher up in the chest. This increase
the pressure in the chest, which force the air in the lungs out through the
nose.
