Question

question: which of the following rises and falls, changing the space within the chest cavity to fill and empty the lungs? answer options: select one of four alveoli diaphragm larynx bronchiole

Explanation:

To solve this, we analyze each option:

• Alveoli: Tiny air sacs for gas exchange, don't change chest cavity space.
• Diaphragm: A muscle that contracts (falls) and relaxes (rises), altering chest cavity volume to facilitate breathing.
• Larynx: Involved in voice production, not chest cavity space change.
• Bronchiole: Small airways, no role in changing chest cavity space.

Answer:

B. Diaphragm