Pressure filtration is associated with:

Options

A. glomerular capsule
B. distal convoluted tubule
C. collecting duct
D. all of these

Explanation

**Step-by-Step Solution:**

1. **Understanding Pressure Filtration**: Pressure filtration, also known as ultrafiltration, is a process where fluids and solutes are filtered through a membrane due to the pressure exerted by blood.

2. **Identifying the Location**: In the human body, pressure filtration primarily occurs in the kidneys, specifically within the glomerulus, which is a network of capillaries surrounded by the glomerular capsule (Bowman's capsule).

3. **Analyzing the Options**:
- **Option A: Glomerular Capsule**: This is the correct answer because the glomerular capsule is where ultrafiltration occurs, driven by the pressure from the blood in the glomerulus.
- **Option B: DCT (Distal Convoluted Tubule)**: This part of the nephron is involved in the reabsorption of water and ions but is not primarily associated with pressure filtration.
- **Option C: Collecting Duct**: Similar to the DCT, the collecting duct is involved in the final concentration of urine and does not play a role in pressure filtration.
- **Option D: All of these**: Since only the glomerular capsule is directly associated with pressure filtration, this option is incorrect.

4. **Conclusion**: Based on the analysis, the correct answer is **Option A: Glomerular Capsule**.