At higher altitudes body overcome altitude sickness by increasing

Options

A. Binding capacity of haemoglobin with O2
B. RBCs production
C. Breathing rate
D. Both (2) and (3)

Answer

To solve the question regarding how the body overcomes altitude sickness at higher altitudes, we can break it down into several steps:

### Step-by-Step Solution:

1. **Understanding Altitude Sickness**:
- Altitude sickness occurs when individuals ascend to high altitudes where the air pressure is lower. This leads to a decrease in the availability of oxygen, which can cause symptoms such as headache, nausea, and fatigue.

**Hint**: Think about the relationship between altitude and oxygen levels.

2. **Body's Response to Low Oxygen**:
- When the body detects lower oxygen levels, it triggers physiological adaptations to compensate for the reduced oxygen availability.

**Hint**: Consider how the body might react to a lack of oxygen.

3. **Increase in Red Blood Cell (RBC) Production**:
- One of the primary responses of the body is to increase the production of red blood cells (RBCs). This process is stimulated by the hormone erythropoietin, which is produced by the kidneys in response to low oxygen levels.

**Hint**: Focus on what components in the blood are responsible for oxygen transport.

4. **Increased Breathing Rate**:
- Alongside increased RBC production, the body also increases the breathing rate (ventilation). This helps to take in more oxygen with each breath, further compensating for the lower oxygen levels at high altitudes.

**Hint**: Think about how breathing is affected by physical exertion or environmental changes.

5. **Conclusion**:
- The combined effect of increased RBC production and increased breathing rate helps the body to overcome altitude sickness by ensuring that more oxygen is available in the bloodstream, thus alleviating the symptoms associated with altitude sickness.

**Hint**: Summarize the two main physiological changes that help in overcoming altitude sickness.

### Final Answer:
At higher altitudes, the body overcomes altitude sickness by increasing the production of red blood cells (RBCs) and the breathing rate. These adaptations enhance oxygen delivery to tissues, mitigating the effects of reduced oxygen availability.