Question

Contraction of the intercostal muscles and the diaphragm causes the thoracic cavity to ____ and air pressure in the lungs to

Answer 1

Contraction of the intercostal muscles and the diaphragm causes the thoracic cavity to expand the chest wall and decreases air pressure in the lungs.

Step-by-step explanation:

Contraction of the intercostal muscles and the diaphragm causes the thoracic cavity to expand the chest wall outward and decreases air pressure in the lungs. This expansion of the thoracic cavity and decrease in pressure allows air to be drawn into the airways.

Answer 2

contraction of the intercostals and diaphragm cause the thoracic cavity to expand, and the air pressure in the lungs to decrease.

this decrease in pressure then pulls in air from outside, thus inspiration occurs.