Endocrine signaling is always a

Options

A. Electrical
B. Mechanical
C. Chemical
D. Physico-chemical

Answer

**Step-by-Step Solution:**

1. **Understanding Endocrine Signaling**: Endocrine signaling refers to the process by which hormones are secreted into the bloodstream by endocrine glands and travel to target organs or tissues to elicit a response.

2. **Identifying the Nature of Hormones**: Hormones are classified as chemical messengers. They are released by glands such as the pituitary gland and travel through the bloodstream to reach their target cells.

3. **Recognizing the Role of Hormones**: Hormones play a crucial role in regulating various body functions, including growth, metabolism, and homeostasis. For example, the growth hormone (GH) directly influences growth in bones and other tissues.

4. **Differentiating Between Signaling Types**: Unlike electrical or mechanical signaling, which are associated with the nervous system, endocrine signaling is purely chemical in nature. This means that it relies on the release and action of hormones.

5. **Conclusion**: Based on the understanding that endocrine signaling involves the release of chemical messengers (hormones) that travel through the bloodstream to exert their effects, we can conclude that endocrine signaling is always a chemical process.

**Final Answer**: Endocrine signaling is always a **chemical** process.

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