What is true regarding the absorption of end products of digestion in humans?

Options

A. Fructose is absorbed by simple diffusion.
B. Some drugs like acetyl salicylic acid and alcohol are absorbed from the oral mucosa
C. The largest amount of water is absorbed from the large intestine
D. Fatty acids and glycerol are reformed into chylomicrons that are transported into lacteals

Answer

To determine what is true regarding the absorption of end products of digestion in humans, we can analyze the options provided in the question. Here is a step-by-step solution:

### Step-by-Step Solution:

1. **Understanding Fructose Absorption**:
- Fructose is a monosaccharide that is absorbed in the intestines.
- It is absorbed through facilitated diffusion, which requires a carrier protein, not simple diffusion.
- Therefore, any statement claiming that fructose is absorbed by simple diffusion is incorrect.

**Hint**: Remember the difference between simple diffusion and facilitated diffusion, especially for specific sugars.

2. **Absorption of Drugs**:
- The question mentions that some drugs like acetylsalicylic acid and alcohol are absorbed from the oral mucosa.
- While some drugs can be absorbed through the oral mucosa, alcohol is primarily absorbed in the stomach, not the oral mucosa.
- Thus, this statement is also incorrect.

**Hint**: Consider where different substances are absorbed in the digestive system.

3. **Water Absorption**:
- The statement claims that the largest amount of water is absorbed from the large intestine.
- However, the majority of water absorption occurs in the small intestine, not the large intestine.
- Therefore, this statement is incorrect as well.

**Hint**: Recall the primary functions of the small and large intestines in digestion and absorption.

4. **Fatty Acids and Glycerols Absorption**:
- The final statement discusses the absorption of fatty acids and glycerols.
- It correctly states that fatty acids and glycerols are reformed into chylomicrons, which are then transported into lacteals (lymphatic vessels).
- This process is essential for the absorption of lipids in the body and is indeed correct.

**Hint**: Focus on the role of chylomicrons in lipid absorption and their pathway through the lymphatic system.

### Conclusion:
The correct statement regarding the absorption of end products of digestion in humans is that fatty acids and glycerols are reformed into chylomicrons that are transported into lacteals. Therefore, the answer is option 4.