State one difference between active and passive absorption.

Explanation

### Step-by-Step Text Solution:

1. **Definition of Absorption**: Absorption is the process by which the end products of digestion pass through the intestinal mucosa into the blood or lymph.

2. **Types of Absorption**: There are three main types of absorption: active absorption, passive absorption, and facilitated absorption.

3. **Active Absorption**:
- **Energy Requirement**: Active absorption requires energy in the form of ATP (adenosine triphosphate).
...