Question

During expiration the diaphragm becomes

• A. Oblique
• B. Dome-shaped
• C. Bulging
• D. Flattened

Answer 1

The correct option is B

Dome-shaped

The correct option : B

The explanation for the correct answer:

1. Inhalation and exhalation are the two parts of the breathing process.
2. The diaphragm is a muscle that lies beneath the lungs.
3. It is a vital muscle in the process of respiration since it is engaged in breathing.
4. During expiration, the diaphragm relaxes, the cavity volume decreases, and the pressure rises.
5. The lungs constrict as a result, and the air is driven out.
6. A vacuum is created by this contraction.
7. This causes air to be drawn into the lungs.
8. The diaphragm relaxes and returns to its normal domelike shape during exhale.

Final answer: During expiration the diaphragm becomes dome-shaped.