The Brightness of the Dot Corresponds to the ________ of the Returning

question 9

Multiple Choice

The brightness of the dot corresponds to the ________ of the returning echo.

• A) location
• B) speed
• C) strength
• D) angle

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Definitions:

Bronchi

The major air passages of the lungs that diverge from the windpipe, providing the pathway for air flow.

Alveoli

Minute pulmonary vesicles where oxygen is swapped for carbon dioxide in the respiratory process.

Bronchial Constriction

The narrowing of the bronchi in the lungs due to the tightening of surrounding smooth muscle, leading to difficulty breathing.

Pulmonary Emphysema

A long-term, progressive disease of the lungs that primarily causes shortness of breath due to over-inflation of the air sacs (alveoli) in the lungs.