Glomerulus in kidney is formed by

Options

A. renal artery and renal vein
B. afferent arteriole and renal venule
C. efferent arteriole and renal portal vein
D. afferent renal arteriole

Answer

**Step-by-Step Solution:**

1. **Understanding the Glomerulus**: The glomerulus is a network of small blood vessels (capillaries) located at the beginning of each nephron in the kidney. It plays a crucial role in the filtration of blood to form urine.

2. **Identifying the Components**: The glomerulus is formed by a tuft of capillaries that receive blood from the afferent arterioles. The afferent arterioles are small branches of the renal artery.

3. **Analyzing the Options**:
- Option A (renal artery and renal vein) is incorrect because the renal vein does not contribute to the formation of the glomerulus.
- Option B (afferent arterial and renal vein) is incorrect for the same reason; the renal vein is not involved in forming the glomerulus.
- Option C (afferent arterial and renal portal vein) is incorrect because the renal portal vein is not a component of the glomerulus.
- Option D (afferent renal arterial) is correct as it directly refers to the afferent arterioles that supply blood to the glomerulus.

4. **Conclusion**: The glomerulus in the kidney is formed by the afferent renal artery.

**Final Answer**: The correct answer is Option D: afferent renal arterial.

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