The combining form -oxia refers to which substance?

The combining form -oxia refers to which substance?

• A. Nitrogen
• B. Hydrogen
• C. Oxygen
• D. Carbon dioxide

Answer: (C)

The combining form -oxia signals the presence or absence of oxygen in tissues or blood. It’s used in terms like hypoxia (low oxygen), normoxia (normal oxygen), and hyperoxia (excess oxygen), all referring to oxygen levels. That’s why the substance linked to -oxia is oxygen. Nitrogen and hydrogen aren’t described with -oxia, and carbon dioxide isn’t typically indicated by this suffix.

The combining form -oxia signals the presence or absence of oxygen in tissues or blood. It’s used in terms like hypoxia (low oxygen), normoxia (normal oxygen), and hyperoxia (excess oxygen), all referring to oxygen levels. That’s why the substance linked to -oxia is oxygen. Nitrogen and hydrogen aren’t described with -oxia, and carbon dioxide isn’t typically indicated by this suffix.