Which of the following statements is incorrect ?

Options

A. Hormones are required in small quantities
B. Hormones are released directly into the blood
C. Hormones are highly specific in their function
D. Hormones provide energy or building materials

Answer

To determine which statement about hormones is incorrect, we will analyze each option provided in the question.

### Step-by-Step Solution:

1. **Understand the Role of Hormones**:
- Hormones are chemical substances produced by glands in the endocrine system. They act as chemical messengers and are secreted directly into the bloodstream.

2. **Evaluate Each Statement**:
- **Option 1**: "Hormones are required in small quantities."
- This statement is correct. Hormones are indeed effective in very small amounts.

- **Option 2**: "Hormones are released directly into the blood."
- This statement is also correct. Hormones are secreted directly into the bloodstream to reach their target organs.

- **Option 3**: "Hormones are highly specific in their function."
- This statement is true as well. Hormones target specific cells and elicit specific responses.

- **Option 4**: "Hormones provide energy or building material."
- This statement is incorrect. Hormones do not provide energy or serve as building materials; rather, they regulate various physiological processes and behaviors.

3. **Identify the Incorrect Statement**:
- After evaluating all options, we find that **Option 4** is the incorrect statement regarding hormones.

### Final Answer:
The incorrect statement is **Option 4: Hormones provide energy or building material.**

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