Which is not part of glomerular ultrafiltrate ?

Options

A. Bowman's capsule
B. RBC
C. Amino acids
D. Minerals

Answer

To determine which option is not part of glomerular ultrafiltrate, let's analyze each option step by step.

### Step 1: Understand Glomerular Ultrafiltrate
Glomerular ultrafiltrate is the fluid that is filtered from the blood in the glomerulus of the nephron. It contains various substances that pass through the filtration barrier.

### Step 2: Analyze the Options
1. **Bowman's Capsule**: This is the structure that collects the glomerular ultrafiltrate. It is a part of the nephron and is not a component of the ultrafiltrate itself.

2. **RBCs (Red Blood Cells)**: These are large cells that do not pass through the filtration barrier of the glomerulus. Therefore, they are not part of the glomerular ultrafiltrate.

3. **Amino Acids**: These are small molecules that can pass through the filtration barrier and are typically found in the ultrafiltrate.

4. **Minerals**: Similar to amino acids, minerals (like electrolytes) are small enough to pass through the filtration barrier and are present in the ultrafiltrate.

### Step 3: Identify the Correct Answer
From the analysis:
- **Bowman's Capsule** is not a component of the ultrafiltrate; it is merely the structure that collects it.
- **RBCs** are too large to be filtered and are not part of the ultrafiltrate.
- **Amino Acids** and **Minerals** are components of the ultrafiltrate.

Thus, the option that is **not part of glomerular ultrafiltrate** is **RBCs**.

### Final Answer
**RBCs (Red Blood Cells)** are not part of glomerular ultrafiltrate.

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