square 1. What is the magnification of the oil immersion lens when utilizing a microscope? A. 4X B. 10X C. 40X D. 100X 2. Which of the following stain pink with H&E stain? A. Cytoplasm B. Collagen fibers C. Nucleus D. Elastic tibers 3. During the preparation of tissue sample a routine H&E slide, what step occurs after the tissue is fixated? A. Embedding in paraffin B. Staining C. Slicing D. Observation 4. What are Sudan stains used primarily for? A. Blood

1. The magnification of the oil immersion lens when utilizing a microscope is D. 100X. The oil immersion lens is the highest magnification lens available on a microscope, typically used for observing very small specimens. It has a magnification of 100X, allowing for detailed and clear observations of microscopic structures.<br /><br />2. The correct answer is C. Nucleus. Hematoxylin and eosin (H&E) staining is a common technique used in histology to visualize tissues. Hematoxylin stains the nucleus blue or purple, while eosin stains the cytoplasm pink. Collagen fibers and elastic fibers are also stained by eosin but do not appear pink with H&E staining.<br /><br />3. The correct answer is A. Embedding in paraffin. After the tissue is fixated, it is then embedded in paraffin wax to create a solid block. This embedding process allows for precise sectioning of the tissue, which is essential for microscopic examination. Staining, slicing, and observation are subsequent steps in the preparation of a tissue sample for microscopy.<br /><br />4. Sudan stains are used primarily for A. Blood. Sudan stains, such as Sudan IV or Sudan Black B, are used to detect the presence of lipids or fats in tissues or cells. They specifically stain lipid-containing structures, making them visible under a microscope. Sudan stains are commonly used in histology and pathology to identify fat deposits or lipid-containing cells.