Which of the following is correct about the natural of hormones ?
1. Hormones are non - nutrient chemicals.
Hormone act as intercellular messengers
3. Hormones are reusable
4. A hormone is produced by exocrine glands

Options

A. I and II
B. III and IV
C. I and III
D. I and IV

Answer

To determine which statements about hormones are correct, let's analyze each option step by step:

1. **Hormones are non-nutrient chemicals.**
- Hormones are indeed classified as non-nutrient chemicals. They are biochemical substances that are produced by glands and released into the bloodstream to regulate various physiological processes in the body. They do not provide energy or serve as building blocks for cells, which is characteristic of nutrients.

2. **Hormones act as intercellular messengers.**
- This statement is also correct. Hormones function as intercellular messengers, meaning they transmit signals between cells to coordinate and regulate bodily functions. They travel through the bloodstream to target organs or tissues, where they exert their effects.

3. **Hormones are reusable.**
- This statement is misleading. While hormones can have prolonged effects in the body, they are not considered reusable in the sense that they are broken down and metabolized after exerting their effects. Once a hormone has acted on its target, it is typically degraded or removed from circulation.

4. **A hormone is produced by exocrine glands.**
- This statement is incorrect. Hormones are produced by endocrine glands, which are ductless glands that release hormones directly into the bloodstream. Exocrine glands, on the other hand, secrete substances through ducts to the outside of the body or into the digestive system (e.g., sweat glands, salivary glands).

Based on this analysis, the correct statements about hormones are:
- **1. Hormones are non-nutrient chemicals.**
- **2. Hormones act as intercellular messengers.**

Thus, the correct answer is the first option, as both the first and second statements are accurate regarding the nature of hormones.