Explain how does a chemical messenger give message to the cell without entering the cell.

Explanation

### Step-by-Step Solution:

1. **Definition of Chemical Messengers**: Chemical messengers, also known as signaling molecules, are substances that transmit signals between cells. They play a crucial role in communication within the body.

2. **Receptors on Cell Membrane**: Cells have specific proteins called receptors located on their surface. These receptors are designed to recognize and bind to specific chemical messengers.

3. **Binding Process**: When a chemical messenger approaches a target cell, it binds to the receptor on the cell's surface. This binding is highly specific, meaning that only certain messengers can bind to certain receptors.

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