What is hyperplasia

Physiological adaptive responses include:  ◆ Hypertrophy - increase in cell size  ◆ Hyperplasia - increase in the number of cells  ◆ Atrophy - decrease in cell size and number ◆ Metaplasia - reversible replacement of one cell type by another differentiated cell type  Hyperplasia is common in cells capable of replication namely labile cells / stable cells or stem cells