Factor which is favourable for the formation of oxyhaemoglobin

Answer

**Step-by-Step Solution:**

1. **Definition of Oxyhemoglobin**: Oxyhemoglobin (HbO2) is a complex formed when oxygen (O2) binds to hemoglobin (Hb) in red blood cells. This process is crucial for transporting oxygen from the lungs to tissues throughout the body.

2. **Factors Favoring Formation of Oxyhemoglobin**:
- **Partial Pressure of Oxygen (pO2)**: A high partial pressure of oxygen is favorable for the formation of oxyhemoglobin. This is because a higher pO2 increases the concentration of oxygen available to bind with hemoglobin.

- **Partial Pressure of Carbon Dioxide (pCO2)**: A low partial pressure of carbon dioxide is also favorable for oxyhemoglobin formation. When pCO2 is low, it indicates a lower concentration of carbon dioxide, which promotes the binding of oxygen to hemoglobin.

- **Hydrogen Ion Concentration (pH)**: The concentration of hydrogen ions affects the pH of the blood. A low concentration of hydrogen ions (high pH) is favorable for the formation of oxyhemoglobin. This means that a more alkaline environment supports the binding of oxygen to hemoglobin.

- **Temperature**: Lower temperatures favor the formation of oxyhemoglobin. Higher temperatures can lead to a decrease in the affinity of hemoglobin for oxygen, thus inhibiting the formation of oxyhemoglobin.

3. **Conclusion**: The four key factors that favor the formation of oxyhemoglobin are:
- High partial pressure of oxygen
- Low partial pressure of carbon dioxide
- Low hydrogen ion concentration (high pH)
- Low temperature