If `CO_(2)` level gels increased in the blood, it favours

Options

A. (a) Loading of `O_(2)` in the blood
B. (b) Unloading of `O_(2)` from the blood
C. (c) Decreased availability of oxygenated to tissues
D. (d) Both (a) and (c)

Answer

To solve the question "If CO₂ levels get increased in the blood, it favors...", we need to understand the physiological effects of elevated carbon dioxide levels in the bloodstream. Here is a step-by-step breakdown of the solution:

### Step-by-Step Solution:

1. **Understanding CO₂ Levels**: When CO₂ levels increase in the blood, it leads to a physiological response. CO₂ is a byproduct of cellular respiration and its accumulation indicates that tissues are metabolically active.

**Hint**: Remember that CO₂ is produced during metabolism and its levels can indicate tissue activity.

2. **Effect on pH**: Increased CO₂ levels result in the formation of carbonic acid (H₂CO₃) when CO₂ reacts with water in the blood. This reaction lowers the pH of the blood, making it more acidic.

**Hint**: Think about the relationship between CO₂ and pH; higher CO₂ means lower pH.

3. **Bohr Effect**: The decrease in pH affects hemoglobin's affinity for oxygen. According to the Bohr effect, a lower pH (higher acidity) causes hemoglobin to release oxygen more readily.

**Hint**: Recall the Bohr effect, which explains how pH changes influence oxygen binding to hemoglobin.

4. **Oxygen Unloading**: As a result of the Bohr effect, the increased CO₂ concentration favors the unloading of oxygen from hemoglobin. This means that more oxygen is released into the tissues that are actively using it.

**Hint**: Focus on the term "unloading" when CO₂ levels rise; it indicates that oxygen is being released from hemoglobin.

5. **Conclusion**: Given the options provided in the question, the correct answer is that increased CO₂ levels favor the unloading of oxygen from the blood. This is because the physiological response to high CO₂ is to enhance oxygen delivery to tissues that need it.

**Hint**: Look for the option that mentions "unloading of oxygen" as the correct response to increased CO₂ levels.

### Final Answer:
The correct answer is **B) Unloading of oxygen from the blood**.