Which of the following steps of urine formation takes place in malphigian body?

Options

A. Glomerular filtration
B. reabsorption
C. Tubular secretion
D. counter current mechanism

Answer

**Step-by-Step Solution:**

1. **Understanding the Malpighian Body**: The Malpighian body, also known as the renal corpuscle, consists of two main structures: the glomerulus and Bowman's capsule. This is the initial part of the nephron where urine formation begins.

2. **Identifying the Function of the Malpighian Body**: The primary function of the Malpighian body is to filter blood. In this process, blood enters the glomerulus, and due to the pressure, water, ions, and small molecules are filtered into the Bowman's capsule, forming what is known as glomerular filtrate.

3. **Recognizing the Steps of Urine Formation**: Urine formation involves three main steps:
- Glomerular filtration (occurs in the Malpighian body)
- Tubular reabsorption (occurs mainly in the proximal convoluted tubule and loop of Henle)
- Tubular secretion (occurs in the distal convoluted tubule and collecting duct)

4. **Conclusion**: Since the question specifically asks which step occurs in the Malpighian body, we conclude that the step of urine formation that takes place in the Malpighian body is **glomerular filtration**.

**Final Answer**: Glomerular filtration.

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