Fructose and some amino acids are absorbed by -

Options

A. Active transport
B. Diffusion
C. Facilitated transport
D. Osmosis

Answer

To solve the question regarding how fructose and some amino acids are absorbed, we can break down the process step by step:

### Step-by-Step Solution:

1. **Understanding Absorption**: Fructose and amino acids are nutrients that need to be absorbed into the bloodstream from the digestive tract after food is broken down.

2. **Transport Mechanisms**: There are several mechanisms by which substances can be absorbed in the intestines:
- **Active Transport**: This process requires energy to move substances against their concentration gradient (from lower to higher concentration).
- **Diffusion**: This is a passive process where substances move from an area of higher concentration to an area of lower concentration without the use of energy.
- **Facilitated Transport**: This is also a passive process, but it involves specific carrier proteins that help move substances across the cell membrane.
- **Osmosis**: This is the movement of water across a semipermeable membrane and is not directly relevant to the absorption of fructose and amino acids.

3. **Specific Mechanism for Fructose and Amino Acids**:
- Fructose is absorbed primarily through facilitated diffusion, which means it moves from an area of higher concentration in the intestinal lumen to an area of lower concentration in the cells lining the intestine, aided by specific transport proteins.
- Some amino acids are also absorbed via facilitated diffusion, while others may use active transport depending on their specific properties and the concentration gradient.

4. **Conclusion**: Given the mechanisms of absorption, fructose and some amino acids are absorbed primarily by facilitated transport.

### Final Answer:
Fructose and some amino acids are absorbed by **facilitated transport**.

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