What is the role of fixation in tissue processing?

Study for the CAMLPR Histology Practice Test. Study with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

Fixation preserves tissue architecture by stabilizing proteins and other cellular components through cross-linking, which locks structures in place and inactivates degradative enzymes. This chemical bonding, typically achieved with fixatives like formaldehyde, forms links between amino groups in proteins, creating a stable network that resists distortion during subsequent steps. With this stabilization, the tissue can be dehydrated, cleared, embedded, and cut into thin sections without losing morphology. Staining happens after sectioning to visualize features, while dehydration and clearing are separate processing steps that occur after fixation. So, fixation’s main role is to preserve tissue structure for reliable sectioning and visualization by cross-linking proteins.