cell injury Flashcards
cell injury
when a cell fails to maintain homeostasis
reversible or irreversible
cell/tissue response to injury
adaptation
degeneration
death
apoptosis
necrosis
hypertrophy (adaptive)
increased in cell size
cells synthesize more organelles>cells enlarge
most common in striated muscles
reversible
hyperplasia (Adaptive)
increase in cell numbers
some cells can undergo hyperplasia some can not
labile cells can
permanent cells can not
hyperplasia vs neoplasia
hyper-increase in cell number in response to know stimulus
stimulus stops=hyperplasia stops
neoplasia-uncontrolled cellular replication
cell proliferation is autonomous=does not respond to external stimuli
metaplasia (adaptive)
one differentiated cell type replaced by another
adaptive change to withstand adverse environmental conditions
potentially reversible
atrophy (adaptive)