Which of the following docs not occur once the food is fully mixed with gastric juice in the stomach?

Options

A. Digestion of lipids
B. Digestion of proteins
C. Digestion of starch
D. Absorption of alcohol

Answer

To solve the question "Which of the following does not occur once the food is fully mixed with gastric juice in the stomach?", we will analyze the options provided and the processes that occur in the stomach.

### Step-by-Step Solution:

1. **Understand the Components of Gastric Juice**:
- Gastric juice contains hydrochloric acid (HCl), pepsin (a protease enzyme), gastric lipase, and a small amount of amylase. These components are crucial for digestion in the stomach.

2. **Identify the Digestion Processes**:
- **Digestion of Proteins**: Pepsin, activated from pepsinogen by HCl, digests proteins into smaller peptides. This process occurs in the stomach.
- **Digestion of Lipids**: Gastric lipase begins the digestion of lipids (fats) in the stomach. Therefore, lipid digestion does occur.
- **Digestion of Starch**: Amylase, although present in small amounts, starts the digestion of carbohydrates (starch) in the stomach. Thus, starch digestion also occurs.

3. **Consider Absorption Processes**:
- **Absorption of Alcohol**: Alcohol is primarily absorbed in the small intestine, particularly in the duodenum. While some alcohol can be absorbed in the stomach, the presence of food (bolus) and gastric juice can hinder its absorption into the bloodstream.

4. **Evaluate Each Option**:
- **Digestion of Lipids**: Occurs (wrong answer).
- **Digestion of Proteins**: Occurs (wrong answer).
- **Digestion of Starch**: Occurs (wrong answer).
- **Absorption of Alcohol**: Does not occur effectively due to the presence of food and gastric juice (correct answer).

5. **Conclusion**: The correct answer is that absorption of alcohol does not occur once the food is fully mixed with gastric juice in the stomach.

### Final Answer:
**The correct option is: Absorption of alcohol (Option D).**

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