Amount of `CO_(2)` in inspired air and expired air is respectively -

Options

A. 19.6%, 15.5%
B. 5.3%, 3.6%
C. 0.04%, 3.6%
D. 13.6%, 3.6%

Answer

To solve the question regarding the amount of CO2 in inspired air and expired air, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Composition of Inspired Air**:
- The air we breathe in (inspired air) contains various gases. The primary components are:
- Nitrogen: 78%
- Oxygen: 21%
- Carbon Dioxide (CO2): Approximately 0.04%

2. **Identify the Composition of Expired Air**:
- When we exhale (expired air), the composition changes due to the metabolic processes in our body. The CO2 concentration in expired air is significantly higher because it is a byproduct of cellular respiration. The typical concentration of CO2 in expired air is about 3.6%.

3. **State the Amounts**:
- Therefore, we can summarize the amounts as follows:
- Amount of CO2 in inspired air: **0.04%**
- Amount of CO2 in expired air: **3.6%**

4. **Conclusion**:
- The amounts of CO2 in inspired and expired air are respectively **0.04%** and **3.6%**.

### Final Answer:
The amount of CO2 in inspired air is 0.04% and in expired air is 3.6%.

---