Which one of the following statements is true regarding digestion and absorption of food in humans?

Options

A. a) Fructose and amino acids are absorbed through intestinal mucosa with the help of carrier ions like `Na^(+)`
B. b) Chylomicrons are small lipoprotein particles that are trasnporated from intesntine into blood capillaries.
C. c) About 60% of starch is hydrolysed by salivary amylase in our mouth
D. d) Oxyntic cells in our stomach secrete the proenzyme pepsiongen.

Answer

To determine which statement is true regarding the digestion and absorption of food in humans, let's analyze each option step by step.

### Step-by-Step Solution:

1. **Examine Option A**:
- The statement claims that fructose and amino acids are absorbed through the intestinal mucosa with the help of carrier ions like sodium ions.
- **Analysis**: This statement is correct. In the small intestine, monosaccharides (like fructose) and amino acids are indeed absorbed via specific transport mechanisms that involve sodium ions as carrier ions.

2. **Examine Option B**:
- The statement claims that chylomicrons are small lipoprotein particles that are transported from the intestine to blood capillaries.
- **Analysis**: This statement is incorrect. Chylomicrons are formed in the intestinal cells and are transported via lymphatic vessels called lacteals, not directly into blood capillaries.

3. **Examine Option C**:
- The statement claims that about 60% of starch is hydrolyzed by salivary amylase in the mouth.
- **Analysis**: This statement is also incorrect. In reality, only about 5% of starch is hydrolyzed by salivary amylase in the mouth before the food reaches the stomach.

4. **Examine Option D**:
- The statement claims that auxintic cells in the stomach secrete the proenzyme pepsinogen.
- **Analysis**: This statement is incorrect. The proenzyme pepsinogen is secreted by chief cells (not auxintic cells) in the stomach.

5. **Conclusion**:
- After analyzing all the options, the only true statement is Option A: "Fructose and amino acids are absorbed through the intestinal mucosa with the help of sodium ions."

### Final Answer:
The correct statement regarding digestion and absorption of food in humans is **Option A**: "Fructose and amino acids are absorbed through the intestinal mucosa with the help of sodium ions."