Give one major difference between pinocytosis and phagocytosis.

Explanation

### Step-by-Step Solution:

1. **Definition of Pinocytosis**:
- Pinocytosis is often referred to as "cell drinking." It is a process where the cell engulfs extracellular fluid along with dissolved substances. This occurs through the invagination of the plasma membrane, allowing fluids with larger molecular weights (like proteins, amino acids, and lipids) to enter the cytoplasm.

2. **Definition of Phagocytosis**:
- Phagocytosis is known as "cell eating." In this process, the cell takes in large solid particles or bulk amounts of solid materials. This is typically seen in certain cells like protozoans, which can engulf larger particles through extensions of the plasma membrane.

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