____are responsible for chemical coordination.

Options

A. Neurons
B. Nephrons
C. Hormones
D. Enzymes

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks which entities are responsible for chemical coordination in the body.

2. **Analyzing the Options**:
- **Option 1: Neurons**: Neurons are the basic units of the nervous system. They are responsible for transmitting signals and coordinating movements and behaviors, but they do not primarily handle chemical coordination.
- **Option 2: Nephrons**: Nephrons are the functional units of the excretory system. Their main role is to filter blood and remove waste products, which is not related to chemical coordination.
- **Option 3: Hormones**: Hormones are chemical messengers produced by endocrine glands. They are secreted directly into the bloodstream and regulate various physiological processes, making them crucial for chemical coordination in the body.
- **Option 4: Enzymes**: Enzymes are proteins that catalyze biochemical reactions. While they are important for metabolic processes, they do not directly coordinate chemical activities in the body.

3. **Identifying the Correct Answer**: Based on the analysis, hormones are the only option that directly relates to chemical coordination. They control and regulate numerous body functions through chemical signals.

4. **Conclusion**: The correct answer is **hormones**, as they are responsible for chemical coordination in the body.

**Final Answer**: Hormones are responsible for chemical coordination.

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