Write true or false
Epithelial layer does not allow regulation of materials between body and external environment.

Answer

To determine whether the statement "Epithelial layer does not allow regulation of materials between body and external environment" is true or false, we can analyze the role of epithelial tissues in the body.

### Step-by-Step Solution:

1. **Understanding Epithelial Tissue**: Epithelial tissues are layers of cells that cover the surfaces of the body, both inside and out. They serve various functions, including protection, secretion, absorption, and sensation.

2. **Function of Epithelial Tissue**: One of the key functions of epithelial tissue is to act as a barrier and regulate the exchange of materials. For example, the epithelial layer in the intestines helps in the absorption of nutrients, while the skin acts as a barrier to protect against external pathogens.

3. **Regulation of Materials**: The statement claims that the epithelial layer does not allow regulation of materials. However, epithelial tissues are specifically designed to control what enters and exits the body, thus they play a crucial role in the regulation of materials between the body and the external environment.

4. **Conclusion**: Since epithelial tissues do allow for the regulation of materials, the statement is false.

### Final Answer: **False**

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