Which epithelium is a single layer of mostly columnar cells, sometimes combined with squamous or cuboidal cells?

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Multiple Choice

Which epithelium is a single layer of mostly columnar cells, sometimes combined with squamous or cuboidal cells?

Explanation:
Think about how epithelia are classified by layers and by cell shape. A single layer that is mainly tall, column-shaped fits the description of columnar epithelium. The one-layer arrangement is key here, and the cells are predominantly columnar in shape, even if you might see occasional variations with other shapes. That’s different from simple squamous, which would be flat and scale-like, or from compound (stratified) epithelia, which have more than one layer. Ciliated epithelium highlights the presence of cilia, not the overall shape or the number of layers. So the described tissue best matches columnar epithelium.

Think about how epithelia are classified by layers and by cell shape. A single layer that is mainly tall, column-shaped fits the description of columnar epithelium. The one-layer arrangement is key here, and the cells are predominantly columnar in shape, even if you might see occasional variations with other shapes. That’s different from simple squamous, which would be flat and scale-like, or from compound (stratified) epithelia, which have more than one layer. Ciliated epithelium highlights the presence of cilia, not the overall shape or the number of layers. So the described tissue best matches columnar epithelium.

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