Hypoxia is defined as which of the following?

Hypoxia is defined as which of the following?

• A. Low oxygen in the blood
• B. Excess oxygen in tissues
• C. No oxygen in the lungs
• D. Inadequate oxygen to the tissues and cells

Answer: (D)

Hypoxia means the tissues and cells aren’t getting enough oxygen to meet their needs. It’s about oxygen delivery and utilization at the cellular level, not just what’s in the blood. You can have normal blood oxygen levels but still experience tissue hypoxia if delivery is impaired (for example, due to poor circulation) or if cells can’t use the oxygen (such as in certain toxins). The other options describe different problems: low oxygen in the blood is hypoxemia, no oxygen in the lungs is anoxia, and excess oxygen in tissues is hyperoxia. So the best description of hypoxia is inadequate oxygen reaching the tissues and cells.

Hypoxia means the tissues and cells aren’t getting enough oxygen to meet their needs. It’s about oxygen delivery and utilization at the cellular level, not just what’s in the blood. You can have normal blood oxygen levels but still experience tissue hypoxia if delivery is impaired (for example, due to poor circulation) or if cells can’t use the oxygen (such as in certain toxins). The other options describe different problems: low oxygen in the blood is hypoxemia, no oxygen in the lungs is anoxia, and excess oxygen in tissues is hyperoxia. So the best description of hypoxia is inadequate oxygen reaching the tissues and cells.