What type of staining was used to prepare the sample showing general tissue architecture?

What type of staining was used to prepare the sample showing general tissue architecture?

• A. OsO4
• B. H&E
• C. Masson's trichrome
• D. PAS

Answer: (B)

General tissue architecture is best revealed by hematoxylin and eosin staining. Hematoxylin binds to nucleic acids, staining cell nuclei a blue-purple color, while eosin stains the cytoplasm, extracellular matrix, and other cell components pinkish-red. This combination provides clear contrast that highlights overall organization—cell shapes, layers, boundaries, and how tissues are arranged relative to one another. It’s the standard stain for getting a broad view of tissue morphology. Other stains have more specific targets, which is why they don’t show general architecture as effectively. Osmium tetroxide is used to fix and stain lipids, often for electron microscopy or specialized histology to emphasize membranes. Masson's trichrome differentiates connective tissue and muscle (for example, collagen vs muscle fibers), giving color distinctions that highlight particular tissue types. PAS highlights carbohydrates and related substances like glycogen and basement membranes, revealing specific molecular features rather than overall structure.

General tissue architecture is best revealed by hematoxylin and eosin staining. Hematoxylin binds to nucleic acids, staining cell nuclei a blue-purple color, while eosin stains the cytoplasm, extracellular matrix, and other cell components pinkish-red. This combination provides clear contrast that highlights overall organization—cell shapes, layers, boundaries, and how tissues are arranged relative to one another. It’s the standard stain for getting a broad view of tissue morphology.

Other stains have more specific targets, which is why they don’t show general architecture as effectively. Osmium tetroxide is used to fix and stain lipids, often for electron microscopy or specialized histology to emphasize membranes. Masson's trichrome differentiates connective tissue and muscle (for example, collagen vs muscle fibers), giving color distinctions that highlight particular tissue types. PAS highlights carbohydrates and related substances like glycogen and basement membranes, revealing specific molecular features rather than overall structure.