Which enzyme secreted from endothelial walls of capillaries break down chylomicrons into fatty acids and glycerol

Options

A. gastric lipase
B. lingual lipase
C. lipo protein lipase
D. pancreatic lipase

Answer

To answer the question regarding which enzyme secreted from the endothelial walls of capillaries breaks down chylomicrons into fatty acids and glycerol, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Chylomicrons**:
- Chylomicrons are lipoprotein particles that transport dietary lipids from the intestines to other locations in the body. They are primarily composed of triglycerides, cholesterol, and proteins.

2. **Identifying the Enzymes**:
- The question provides four options: gastric lipase, lingual lipase, lipoprotein lipase, and pancreatic lipase. We need to evaluate which of these enzymes is responsible for breaking down chylomicrons.

3. **Evaluating Each Option**:
- **Gastric Lipase**: This enzyme is secreted in the stomach and primarily acts on triglycerides, but it is not involved in the breakdown of chylomicrons in the bloodstream.
- **Lingual Lipase**: This enzyme is produced in the mouth and begins the digestion of fats, but it does not act on chylomicrons in the bloodstream.
- **Pancreatic Lipase**: This enzyme is secreted by the pancreas and is essential for fat digestion in the small intestine. However, it does not act directly on chylomicrons in the bloodstream.
- **Lipoprotein Lipase**: This enzyme is located on the endothelial walls of capillaries and is specifically responsible for hydrolyzing triglycerides in chylomicrons into free fatty acids and glycerol as they circulate in the bloodstream.

4. **Conclusion**:
- Based on the evaluation, the enzyme that breaks down chylomicrons into fatty acids and glycerol is **lipoprotein lipase**.

### Final Answer:
The enzyme secreted from the endothelial walls of capillaries that breaks down chylomicrons into fatty acids and glycerol is **lipoprotein lipase**.

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