Incomplete fixation leads to which artifact?

• A. Cracks in the tissue and smudgy nuclei.
• B. Uniform staining without artifacts.
• C. Increased tissue elasticity.
• D. No effect on tissue morphology.

Answer: (A)

Incomplete fixation allows fixative penetration to be uneven or insufficient, so proteins aren’t cross-linked properly and cellular structures aren’t preserved during processing. This poor preservation leads to artifacts such as cracks in the tissue and smudgy, indistinct nuclei when the sections are cut and stained. Adequate fixation stabilizes morphology and nuclear detail, preventing these artifacts. The idea that fixation would produce uniform staining, increased tissue elasticity, or no morphological changes doesn’t align with how incomplete fixation disturbs tissue preservation and leads to visible artifacts.