Absence of oxygen in inspired gases is called

Options

A. Asphyxia
B. Anoxia
C. Hypoxia
D. Siderosis

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the term that describes the absence of oxygen in inspired gases. This is a specific condition related to respiratory physiology.

2. **Identifying Key Terms**:
- "Absence of oxygen" indicates a lack of oxygen.
- "Inspired gases" refers to the air that is inhaled into the lungs.

3. **Exploring Possible Answers**:
- **Anoxia**: This term refers to a complete absence of oxygen in the tissues, which can result from a lack of oxygen in inspired gases.
- **Hypoxia**: This term refers to a deficiency of oxygen in the tissues, but not necessarily a complete absence.
- **Cydrosis**: This term is related to the deposition of excess iron in body tissues and is not relevant to oxygen levels.

4. **Analyzing the Options**:
- Since the question specifically asks for the absence of oxygen in inspired gases, the most appropriate term is **Anoxia**.
- Hypoxia is incorrect in this context because it refers to insufficient oxygen rather than a complete absence.
- Cydrosis is also incorrect as it pertains to iron deposition.

5. **Conclusion**: Therefore, the correct answer to the question is **Anoxia**.

**Final Answer**: Anoxia

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