Hyperventilation is

Options

A. Extra deep breathing
B. Rapid breathing
C. Rapid shallow breathing
D. Rapid deep breathing.

Answer

**Step-by-Step Solution:**

1. **Understanding Hyperventilation**: Hyperventilation refers to a state where a person breathes at an abnormally rapid rate. This can lead to a decrease in carbon dioxide levels in the blood.

2. **Identifying Breathing Patterns**: There are different types of breathing patterns:
- Extra deep breathing
- Rapid breathing
- Rapid shallow breathing
- Rapid deep breathing

3. **Analyzing the Options**:
- **Extra Deep Breathing**: This refers to taking deeper breaths but does not necessarily imply rapidity.
- **Rapid Breathing**: This is a general term that could refer to either shallow or deep breaths taken quickly.
- **Rapid Shallow Breathing**: This indicates quick breaths that do not fill the lungs completely.
- **Rapid Deep Breathing**: This involves taking quick and deep breaths, which is characteristic of hyperventilation.

4. **Effects of Hyperventilation**: When someone hyperventilates, they breathe in more oxygen and expel more carbon dioxide than normal. This can lead to symptoms such as dizziness, tingling in the extremities, and a feeling of lightheadedness due to low carbon dioxide levels in the blood.

5. **Conclusion**: Based on the analysis, the correct answer to the question "Hyperventilation is" is **rapid deep breathing**.

**Final Answer**: Hyperventilation is rapid deep breathing (Option D).

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