Gas exchange continue uninterrupted in the lungs even after a forceful expiration.

Answer

### Step-by-Step Solution:

1. **Understanding Gas Exchange**: Gas exchange in the lungs primarily occurs in the alveoli, where oxygen is absorbed into the blood, and carbon dioxide is released from the blood into the alveoli.

2. **Forceful Expiration**: During a forceful expiration, we expel a significant amount of air from our lungs. However, it is important to note that not all air is expelled; a residual volume of air remains in the lungs.

3. **Residual Volume**: The air that remains in the lungs after forceful expiration is known as the residual volume. This volume is crucial because it ensures that there is always some air available in the alveoli for gas exchange.

4. **Continuous Gas Exchange**: Since the alveoli retain some air even after forceful expiration, gas exchange can continue uninterrupted. Oxygen can still diffuse into the blood, and carbon dioxide can diffuse out, maintaining the necessary exchange of gases.

5. **Conclusion**: Therefore, the statement that gas exchange continues uninterrupted in the lungs even after a forceful expiration is true. The presence of residual air in the alveoli allows for continuous gas exchange regardless of the breathing cycle.