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Q: Which type of epithelium is made of a single thin layer of flattened cells with irregular boundaries?
  • A. cuboidal
  • B. columnar
  • C. ciliated
  • D. squamous
Correct Answer: Option D - Squamous epithelium is a single layer of flat cell in contact with the basal lamina of the epithelium. Squamous epithelium is made of a single layer of flattened cell with irregular boundaries. Squamous epithelium is often permeable and occurs where small molecules need to pass quickly through membrane via filtration/diffusion.
D. Squamous epithelium is a single layer of flat cell in contact with the basal lamina of the epithelium. Squamous epithelium is made of a single layer of flattened cell with irregular boundaries. Squamous epithelium is often permeable and occurs where small molecules need to pass quickly through membrane via filtration/diffusion.

Explanations:

Squamous epithelium is a single layer of flat cell in contact with the basal lamina of the epithelium. Squamous epithelium is made of a single layer of flattened cell with irregular boundaries. Squamous epithelium is often permeable and occurs where small molecules need to pass quickly through membrane via filtration/diffusion.