A self-regulated system is said to be in a state of homeostasis.

Answer

### Step-by-Step Solution:

1. **Understanding Homeostasis**:
- Homeostasis refers to the ability of an organism or a system to maintain a stable internal environment despite changes in external conditions. This involves regulating various physiological processes to keep conditions within a narrow range.

2. **Identifying Self-Regulated Systems**:
- A self-regulated system is one that can control its internal environment without the need for external intervention. This means it can respond to changes and adjust its processes accordingly.

3. **Connecting Homeostasis and Self-Regulation**:
- Since homeostasis involves maintaining a constant internal environment, it inherently requires self-regulation. A self-regulated system can adjust its functions to ensure that homeostasis is achieved.

4. **Conclusion**:
- Therefore, the statement "A self-regulated system is said to be in a state of homeostasis" is **True**. This is because self-regulation is a fundamental aspect of maintaining homeostasis in living organisms.