Which epithelium lines kidney tubules, and what feature supports reabsorption?

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Prepare for the Epithelial Tissue Structure and Function Test. Explore with multiple choice questions and explanations. Master epithelial tissue concepts for your exam success!

Multiple Choice

Which epithelium lines kidney tubules, and what feature supports reabsorption?

Explanation:
The key idea is that kidney tubules are built for reabsorption, so their lining is a simple cuboidal epithelium whose apical surface has a brush border of microvilli. Those microvilli dramatically increase the cell’s surface area, giving many transporters and channels to reclaim water, ions, glucose, and amino acids from the filtrate back into the blood. In the proximal tubule, this brush border is especially prominent, making reabsorption highly efficient. Other epithelial types described won’t provide that same absorptive architecture or surface-area boost.

The key idea is that kidney tubules are built for reabsorption, so their lining is a simple cuboidal epithelium whose apical surface has a brush border of microvilli. Those microvilli dramatically increase the cell’s surface area, giving many transporters and channels to reclaim water, ions, glucose, and amino acids from the filtrate back into the blood. In the proximal tubule, this brush border is especially prominent, making reabsorption highly efficient. Other epithelial types described won’t provide that same absorptive architecture or surface-area boost.

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