Mention any two mechanisms how human body compensates low oxygen availability at higher altitude.

Explanation

To address the question about how the human body compensates for low oxygen availability at higher altitudes, we can identify two primary mechanisms:

### Step-by-Step Solution:

1. **Increased Red Blood Cell (RBC) Production**:
- At higher altitudes, where oxygen levels are lower, the human body responds by increasing the production of red blood cells. This process is stimulated by the hormone erythropoietin (EPO), which is released by the kidneys in response to low oxygen levels.
- With more red blood cells in circulation, there is a greater amount of hemoglobin available. Hemoglobin is the protein in red blood cells that binds to oxygen. An increase in RBC count enhances the blood's oxygen-carrying capacity, allowing more oxygen to be transported to tissues and organs.

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