Cell products are secreted from the cell through:

Options

A. facilitated transport
B. active transport
C. endocytosis
D. exocytosis

Explanation

To answer the question "Cell products are secreted from the cell through:", we will analyze the provided options step by step.

### Step 1: Understand the Options
We have four options to consider:
1. Facilitated transport
2. Active transport
3. Endocytosis
4. Exocytosis

### Step 2: Evaluate Each Option
**Option 1: Facilitated Transport**
- Facilitated transport, also known as facilitated diffusion, involves the movement of particles across the plasma membrane through transmembrane proteins. This process occurs down the concentration gradient (from higher to lower concentration).
- **Conclusion**: This is incorrect for secretion of cell products.

**Option 2: Active Transport**
- Active transport requires energy (ATP) to move substances against their concentration gradient (from lower to higher concentration).
- **Conclusion**: This is also incorrect for the secretion of cell products.

**Option 3: Endocytosis**
- Endocytosis is a process where the plasma membrane folds inward to engulf large particles, forming vesicles that bring materials into the cell.
- **Conclusion**: This process is about bringing materials into the cell, not secreting them out, so it is incorrect.

**Option 4: Exocytosis**
- Exocytosis is the process where vesicles containing cell products fuse with the plasma membrane and release their contents outside the cell. This is the primary method for the secretion of substances such as hormones, neurotransmitters, and waste materials.
- **Conclusion**: This is the correct option for the secretion of cell products.

### Final Answer
Cell products are secreted from the cell through **exocytosis**.

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