14 Questions
homeostasis
normal cells have a fairly narrow range of function or steady state.
adaptation
change in cell morphology and function in response to a stimulus. it is reversible.
injury
too much stress exceeds the cell's adaptive capacity.
all of the answer's adaptations except
necrosis
all of this answer's cell injury irreversible except
cloudy swelling
all of this answer's according to cell injury reversible except
hyperplasia
hypertrophy
increase in the size of individual cells in response to stimulus or injury.
hyperplasia
increase in the absolute number of cells
atrophy
decrease size and number of its component cells.
metaplasia
one mature tissue type replaces another mature tissue type.
form of cell injury depends on
all of the above
causes of cell injury
- oxygen deprivation, hypoxia, ischemia. The most important cause.
- physical and chemical agents.
- immunological reactions.
- nutritional imbalance.
pathogenesis of cell injury. role of mitochondria
mitochondrial oxidative phosphorylation is disrupted first, decrease ATP.
- decreased NA pump, gain of intracellular Na, cell swelling.
- altered metabolism, and depletion of glycogen [anaerobic respiration with glycogenolysis].
- lactic acid accumulation, decreased PH and increased intracellular osmotic pressure intracellular H2O cell swelling.
cloudy swelling
mild degeneration characterized by cell swelling and granularity of the cytoplasm due to intracellular accumulation of water.
Test your knowledge on cell adaptation and injury with this quiz. Explore concepts of homeostasis, reversible and irreversible cell injury, and adaptations in response to different stimuli.
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