Effective filtration pressure in glomerulus is caused due to

Options

A. powerful pumping action of the heart
B. secretion of adrenaline
C. afferent arteriole is slightly wider than efferent arteriole
D. vaccum develops in proximal convoluted tubule and sucks the blood.

Explanation

### Step-by-Step Solution:

1. **Understanding the Concept of Filtration Pressure**:
- The effective filtration pressure in the glomerulus is the pressure that drives the filtration of blood into the Bowman’s capsule in the kidneys.

2. **Identifying Factors Affecting Filtration Pressure**:
- Several factors can influence effective filtration pressure, including the diameter of the afferent and efferent arterioles, the pumping action of the heart, and other physiological mechanisms.

3. **Analyzing the Role of Afferent and Efferent Arterioles**:
- The afferent arteriole carries blood into the glomerulus, while the efferent arteriole carries blood away.
- The diameter of the afferent arteriole is larger than that of the efferent arteriole.

4. **Impact of Afferent Arteriole Diameter**:
- A larger diameter of the afferent arteriole allows more blood to flow into the glomerulus, increasing the volume of blood present.
- This increased volume results in higher pressure within the glomerulus, which enhances the filtration rate.

5. **Conclusion**:
- The effective filtration pressure in the glomerulus is primarily caused by the fact that the afferent arteriole is slightly wider than the efferent arteriole. This anatomical difference leads to increased blood volume and pressure, promoting filtration.

### Final Answer:
The effective filtration pressure in the glomerulus is caused due to the afferent arteriole being slightly wider than the efferent arteriole.

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