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Multiple Choice
Why are stains used when observing biological tissues under a microscope?
A
To reduce the light intensity passing through the tissues
B
To increase the magnification of the microscope
C
To enhance the contrast of the tissues
D
To preserve the tissues for long-term storage
Verified step by step guidance
1
Begin by understanding the purpose of using stains in microscopy. Stains are chemical compounds that bind to specific components of biological tissues, making them more visible under a microscope.
Recognize that biological tissues are often transparent or have very little natural color, which makes it difficult to distinguish different structures or components within the tissue.
Consider the role of contrast in microscopy. Contrast refers to the difference in light intensity between the specimen and its background, which helps in distinguishing different parts of the tissue.
Stains enhance contrast by coloring specific parts of the tissue, such as cell walls, nuclei, or other organelles, allowing these structures to stand out against the unstained parts of the tissue.
Understand that while stains do not affect the magnification or preservation directly, they are crucial for improving visibility and differentiation of structures, which is essential for accurate observation and analysis.