If the blood does not deliver adequate `O_(2)` to the
tissues, it is called

Options

A. Anaemia
B. Anorexia
C. Hypoxia
D. Hypopnea

Answer

To answer the question, "If the blood does not deliver adequate O₂ to the tissues, it is called," we need to analyze the options provided: anemia, anorexia, hypoxia, and hyperpnea.

### Step-by-Step Solution:

1. **Understanding Anemia**:
- Anemia is a condition characterized by a low level of hemoglobin or a low count of red blood cells (RBCs).
- Hemoglobin is crucial for carrying oxygen in the blood. Therefore, while anemia can lead to insufficient oxygen delivery to tissues, it is primarily a blood condition related to hemoglobin levels.

**Hint**: Consider what anemia specifically affects in the blood.

2. **Understanding Anorexia**:
- Anorexia is an eating disorder where individuals intentionally avoid food to lose weight.
- This condition does not directly relate to oxygen delivery in the blood or tissues.

**Hint**: Think about the definition of anorexia and its impact on nutrition rather than oxygen supply.

3. **Understanding Hypoxia**:
- Hypoxia refers to a condition where there is a deficiency of oxygen in the tissues.
- This can occur due to various reasons, including low atmospheric oxygen, low hemoglobin levels (as seen in anemia), or conditions that impair breathing (like asthma or COPD).
- Hypoxia directly describes the lack of oxygen delivery to tissues, making it the most relevant term for the question.

**Hint**: Focus on the term that specifically addresses oxygen deficiency in tissues.

4. **Understanding Hyperpnea**:
- Hyperpnea is characterized by an increased depth and rate of breathing, often in response to increased physical activity or metabolic demand.
- It does not indicate a lack of oxygen delivery but rather an increase in respiratory effort.

**Hint**: Consider how hyperpnea relates to breathing patterns rather than oxygen delivery issues.

5. **Conclusion**:
- After analyzing all the options, the correct answer to the question is **hypoxia**, as it specifically refers to the condition where there is inadequate oxygen delivery to the tissues.

**Final Answer**: Hypoxia (Option C) is the correct answer.