Which type of simple epithelium consists of a single layer of flat, scale-like cells and is specialized for diffusion and filtration?

• A. Simple squamous epithelium
• B. Simple columnar epithelium
• C. Simple cuboidal epithelium
• D. Stratified squamous epithelium

Answer: (A)

Verified step by step guidance

1. Understand the structure and function of simple squamous epithelium: It consists of a single layer of flat, scale-like cells. This thin structure allows for efficient diffusion and filtration, making it ideal for areas like the alveoli in the lungs and the glomeruli in the kidneys.
2. Compare the characteristics of simple squamous epithelium with other types of simple epithelium: Simple columnar epithelium consists of taller, column-like cells specialized for absorption and secretion, often found in the digestive tract. Simple cuboidal epithelium consists of cube-shaped cells and is involved in secretion and absorption, commonly found in glands and kidney tubules.
3. Differentiate simple squamous epithelium from stratified squamous epithelium: Stratified squamous epithelium consists of multiple layers of cells, providing protection against abrasion and is found in areas like the skin and esophagus. This structure is not specialized for diffusion or filtration.
4. Identify the key functions of simple squamous epithelium: Its thin, flat cells are specialized for processes like gas exchange in the lungs and filtration in the kidneys, which require minimal barrier thickness.
5. Select the correct answer based on the description and function: The type of simple epithelium specialized for diffusion and filtration is simple squamous epithelium.