Which of the following structures is composed of cuboidal epithelium and contains microvilli?
(a) Glomerulus
(b) Ducts of glands
(c) Proximal convoluted tubule of nephron
(d) Distal convoluted tubule of nephron

Options

A. Glomerulus
B. Ducts of glands
C. Proximal convoluted tubule of nephron
D. Distal convoluted tubule of nephron

Answer

To solve the question, we need to identify which of the given structures is composed of cuboidal epithelium and contains microvilli. Let's analyze each option step by step:

1. **Understanding the Question**: The question asks for a structure that has cuboidal epithelium and microvilli. Cuboidal epithelium consists of cube-shaped cells, and microvilli are small projections that increase the surface area of the epithelial cells.

2. **Analyzing Option A - Glomerulus**:
- The glomerulus is a network of capillaries in the kidney involved in filtration.
- It is lined by a specialized type of epithelium called podocytes, which are not cuboidal and do not have microvilli.
- **Conclusion**: This option is incorrect.

3. **Analyzing Option B - Ducts of Glands**:
- Ducts of glands can have various types of epithelial lining, but they typically do not have microvilli and are not specifically cuboidal.
- They may be lined with columnar or stratified epithelium depending on the gland.
- **Conclusion**: This option is incorrect.

4. **Analyzing Option C - Proximal Convoluted Tubule of Nephron (PCT)**:
- The PCT is a part of the nephron in the kidney responsible for reabsorption.
- It is lined with cuboidal epithelium that has microvilli (often referred to as brush border) to increase the surface area for absorption.
- This structure is specifically adapted for the reabsorption of water, ions, and nutrients.
- **Conclusion**: This option is correct.

5. **Analyzing Option D - Distal Convoluted Tubule of Nephron (DCT)**:
- The DCT also has cuboidal epithelium but has fewer microvilli compared to the PCT.
- Its primary function is to regulate sodium and potassium levels, and it is not primarily involved in absorption like the PCT.
- **Conclusion**: This option is incorrect.

**Final Answer**: The correct answer is (c) Proximal convoluted tubule of nephron.