Answer the following:
Which part of our central neural system acts as a master clock?

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks which part of the central nervous system functions as a master clock in the human body.

2. **Identifying the Master Clock**: In vertebrate animals, including humans, the master clock is a specific group of nerve cells.

3. **Location of the Master Clock**: This group of nerve cells is known as the suprachiasmatic nucleus (SCN).

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