PCT is lined by _____epithelium

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the type of epithelium that lines the Proximal Convoluted Tubule (PCT) of the nephron.

2. **Identifying the Nephron Structure**: The nephron is the basic functional unit of the kidney, consisting of two main parts: the renal corpuscle (which includes the glomerulus and Bowman's capsule) and the renal tubule.

3. **Focusing on the PCT**: The PCT is the first part of the renal tubule that follows the Bowman's capsule. It is crucial for the reabsorption of water, electrolytes, and nutrients from the filtrate.

4. **Function of the PCT**: The PCT is responsible for the reabsorption of approximately 70-80% of water and electrolytes, as well as glucose, from the filtrate back into the bloodstream.

5. **Type of Epithelium**: The PCT is lined by simple cuboidal epithelium. This specific type of epithelium has a brush border, which consists of microvilli.

6. **Importance of Brush Border**: The brush border increases the surface area of the epithelial cells, enhancing the efficiency of reabsorption in the PCT.

7. **Final Answer**: Therefore, the PCT is lined by **simple cuboidal brush border epithelium**.

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