A balloon is been blown up by a healthy person with no known respiratory disorder. Select the option that correctly provides information about the proportion of gasses of air inside the balloon compared to the proportion of gasses of air outside the balloon.
`{:(No,"water vapour","oxygen","carbon dioxide"),(1,"More","More","Less"),(2,"Less","More","More"),(3,"More","Less","More"),(4,"less","Less","More"):}`

Options

A. 1
B. 2
C. 3
D. 4

Answer

To solve the problem, we need to analyze the composition of gases in the air inside the balloon (expired air) compared to the air outside the balloon (atmospheric air).

### Step-by-Step Solution:

1. **Understanding Atmospheric Air Composition**:
- Atmospheric air is composed of approximately 78% nitrogen, 21% oxygen, and 0.04% carbon dioxide, along with varying amounts of water vapor depending on humidity.

2. **Understanding Expired Air Composition**:
- When a healthy person exhales (expires) air, the composition changes due to the processes of respiration.
- The oxygen content decreases because it is used by the body for metabolic processes.
- The carbon dioxide content increases because it is a waste product of metabolism that the body needs to expel.

3. **Water Vapor Content**:
- The air that is inhaled is often dry, but as it passes through the respiratory tract, it is warmed and humidified.
- Therefore, the expired air typically has a higher water vapor content compared to the atmospheric air.

4. **Comparing the Gases**:
- **Oxygen**: In the expired air, the proportion of oxygen is **less** than in the atmospheric air because the body has utilized some of it.
- **Carbon Dioxide**: In the expired air, the proportion of carbon dioxide is **more** than in the atmospheric air due to metabolic processes.
- **Water Vapor**: In the expired air, the proportion of water vapor is **more** than in the atmospheric air because of the humidification process in the respiratory tract.

5. **Conclusion**:
- Based on the analysis, the correct option that describes the proportions of gases in the air inside the balloon compared to the air outside is:
- Water vapor: **More**
- Oxygen: **Less**
- Carbon Dioxide: **More**

Thus, the correct answer is option **C**: (More, Less, More).