Which type of repair involves damaged cells being replaced with simpler cells?

Which type of repair involves damaged cells being replaced with simpler cells?

• A. Regeneration
• B. Remodeling
• C. Replacement
• D. Healing

Answer: (C)

When tissue repair substitutes the lost tissue with scar tissue made of simpler cells and connective tissue, that process is called replacement. This happens because the area cannot be rebuilt with the original specialized cells, so the body fills it with fibrous tissue, which is functionally and structurally different from the original. Regeneration would recreate the exact same cells and restore normal structure and function, which is not what occurs in replacement. Healing is the overall repair process and can include both regeneration and replacement, while remodeling refers to the later maturation and reorganization of the scar. So replacing damaged cells with simpler, scar-forming tissue best fits the concept of replacement.

When tissue repair substitutes the lost tissue with scar tissue made of simpler cells and connective tissue, that process is called replacement. This happens because the area cannot be rebuilt with the original specialized cells, so the body fills it with fibrous tissue, which is functionally and structurally different from the original. Regeneration would recreate the exact same cells and restore normal structure and function, which is not what occurs in replacement. Healing is the overall repair process and can include both regeneration and replacement, while remodeling refers to the later maturation and reorganization of the scar. So replacing damaged cells with simpler, scar-forming tissue best fits the concept of replacement.