Question

multiple choice question
which action would cause airflow through the airways into the alveoli?
o relaxation of diaphragm
o contraction of diaphragm

Explanation:

When the diaphragm contracts, it moves downward, increasing the volume of the thoracic cavity. This decrease in pressure (compared to atmospheric pressure) causes air to flow into the lungs (through airways into alveoli) as per Boyle's law (pressure - volume relationship in gases). Relaxation of the diaphragm would lead to exhalation as the thoracic cavity volume decreases and pressure increases, pushing air out.

Answer:

contraction of diaphragm