Which of the following best describes pseudostratified epithelium?

• A. A single layer of cube-shaped cells with centrally located nuclei
• B. A single layer of cells that appears to be multiple layers due to varying cell heights and nuclei positions
• C. Multiple layers of flat cells with nuclei aligned in a single row
• D. Multiple layers of column-shaped cells with all cells touching the basement membrane

Answer: (B)

Verified step by step guidance

1. Understand the term 'pseudostratified epithelium': It refers to a type of epithelial tissue that appears to have multiple layers due to the varying heights of the cells and the positions of their nuclei, but it is actually a single layer of cells.
2. Analyze the structure of pseudostratified epithelium: The cells are all attached to the basement membrane, which confirms it is a single layer, even though the nuclei are positioned at different levels, giving the illusion of stratification.
3. Compare the options provided: Eliminate choices that describe multiple layers of cells, as pseudostratified epithelium is not truly stratified.
4. Focus on the correct description: Identify the option that mentions a single layer of cells with varying heights and nuclei positions, as this matches the definition of pseudostratified epithelium.
5. Confirm the correct answer: Ensure the selected option aligns with the anatomical and physiological characteristics of pseudostratified epithelium, which is typically found in areas like the respiratory tract.