The glomerular capillary blood pressure causes filtration of blood through three layers in a sequence of

Options

A. Endothelium, Basement membrane. Epithelium of Bowman's capsule
B. Epithelium of Bowman's capsule, Basement membrane, Endothelium
C. Epithelium of Bowman's capsule, Endothelium, Basement membrane
D. Basement membrane, Endothelium, Epithelium of Bowman's capsule

Answer

To answer the question regarding the sequence of layers through which glomerular capillary blood pressure causes filtration, we can break down the process step by step:

### Step-by-Step Solution:

1. **Understanding Glomerular Filtration**:
- The process of glomerular filtration is the first step in urine formation. It involves the filtering of blood to remove excess fluids and waste products.

2. **Identifying the Layers**:
- There are three main layers involved in the filtration process:
- **Endothelium**: This is the innermost layer of the glomerular capillaries.
- **Basement Membrane**: This layer lies between the endothelium and the epithelium.
- **Epithelium of Bowman's Capsule**: This is the outermost layer that surrounds the glomerulus.

3. **Sequence of Filtration**:
- The correct sequence in which blood is filtered through these layers is:
1. **Endothelium**: Blood first passes through the endothelial layer, which contains large pores allowing certain substances to pass while blocking blood cells.
2. **Basement Membrane**: Next, the blood moves through the basement membrane, which acts as a filtration barrier, preventing larger molecules from passing through.
3. **Epithelium of Bowman's Capsule**: Finally, the filtered fluid enters the epithelium of Bowman's capsule, which contains specialized cells called podocytes that further assist in filtration.

4. **Conclusion**:
- Therefore, the correct sequence of layers through which blood is filtered due to glomerular capillary blood pressure is: **Endothelium → Basement Membrane → Epithelium of Bowman's Capsule**.

### Final Answer:
The correct sequence is: **Endothelium, Basement Membrane, Epithelium of Bowman's Capsule**.