Tissue Injury, Healing, And Pain Practice Test

Tissue type shapes how healing proceeds because different tissues have different cell sources and extracellular matrices that govern regenerative capacity and repair pathways. Epithelial tissues recover quickly through re-epithelialization: basal cells proliferate and migrate across the wound bed to restore the barrier, often with minimal scar and rapid closure. Connective tissues heal more slowly and mainly through fibroblast-driven deposition of collagen and extracellular matrix, forming scar tissue that gradually remodels to restore structure but not the exact original architecture. Bone healing is more complex and organized: after an initial inflammatory response, a soft callus forms with fibrocartilage, then a hard callus of woven bone bridges the fracture, and remodeling converts it to stronger lamellar bone over time. The other statements don’t fit because healing is not identical across tissues, and nervous or muscle tissues have more limited or different regenerative capacities than suggested. Nervous tissue has limited regeneration in the central nervous system, and skeletal muscle does have substantial regenerative potential through satellite cells, though it can be impaired by fibrosis.