Increase in GFR can be due to :

Options

A. Increase in blood colloidal osmotic pressure
B. Increase in capsular hydrostatic pressure
C. Increase in capillary blood pressure
D. More than one option is correct

Answer

To determine the cause of an increase in Glomerular Filtration Rate (GFR), let's analyze the options provided step by step:

### Step 1: Understanding GFR
GFR is the rate at which blood is filtered through the glomeruli in the kidneys. It is influenced by various factors, including blood pressure and osmotic pressures.

### Step 2: Analyzing the Options

1. **Increase in Blood Colloidal Osmotic Pressure**
- Blood colloidal osmotic pressure is primarily due to proteins in the blood plasma. An increase in this pressure would actually oppose filtration, thus decreasing GFR.
- **Conclusion**: This option is incorrect.

2. **Increase in Capsular Hydrostatic Pressure**
- Capsular hydrostatic pressure is the pressure exerted by the fluid in the Bowman’s capsule. An increase in this pressure would push back against the glomerulus, reducing the net filtration pressure and therefore decreasing GFR.
- **Conclusion**: This option is also incorrect.

3. **Increase in Capillary Blood Pressure**
- An increase in capillary blood pressure in the glomerulus enhances the pressure gradient for filtration. This leads to an increase in GFR as more blood is pushed through the glomeruli.
- **Conclusion**: This option is correct.

4. **More than One Option is Correct**
- Since we have established that the first two options are incorrect and only the third option is correct, this statement cannot be true.
- **Conclusion**: This option is incorrect.

### Final Answer
The correct answer is that an increase in GFR can be due to an **increase in capillary blood pressure**.

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