What condition describes a lack of oxygen reaching tissues?

What condition describes a lack of oxygen reaching tissues?

• A. Orthopnea
• B. Hypoxemia
• C. Anoxia
• D. Antipyretic

Answer: (C)

The key idea is tissue oxygenation. Anoxia means there is a complete absence of oxygen reaching the tissues. That’s different from hypoxemia, which is too little oxygen in the blood, and from hypoxia, which is insufficient oxygen at the tissue level (not necessarily zero). Orthopnea is about breathing difficulty when lying down, and an antipyretic is a fever reducer—neither describes oxygen delivery. So for a situation described as a lack of oxygen reaching tissues, anoxia is the best fit.

The key idea is tissue oxygenation. Anoxia means there is a complete absence of oxygen reaching the tissues. That’s different from hypoxemia, which is too little oxygen in the blood, and from hypoxia, which is insufficient oxygen at the tissue level (not necessarily zero). Orthopnea is about breathing difficulty when lying down, and an antipyretic is a fever reducer—neither describes oxygen delivery. So for a situation described as a lack of oxygen reaching tissues, anoxia is the best fit.