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Questions and Answers

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 (D) Signup and view all the answers

all of this answer's cell injury irreversible except

cloudy swelling (B) Signup and view all the answers

all of this answer's according to cell injury reversible except

hyperplasia (A) Signup and view all the answers

hypertrophy

increase in the size of individual cells in response to stimulus or injury. Signup and view all the answers

hyperplasia

increase in the absolute number of cells Signup and view all the answers

atrophy

decrease size and number of its component cells. Signup and view all the answers

metaplasia

one mature tissue type replaces another mature tissue type. Signup and view all the answers

form of cell injury depends on

all of the above (C) Signup and view all the answers

causes of cell injury

<ol> <li>oxygen deprivation, hypoxia, ischemia. The most important cause.</li> <li>physical and chemical agents.</li> <li>immunological reactions.</li> <li>nutritional imbalance.</li> </ol> Signup and view all the answers

pathogenesis of cell injury. role of mitochondria

mitochondrial oxidative phosphorylation is disrupted first, decrease ATP. <ol> <li>decreased NA pump, gain of intracellular Na, cell swelling.</li> <li>altered metabolism, and depletion of glycogen [anaerobic respiration with glycogenolysis].</li> <li>lactic acid accumulation, decreased PH and increased intracellular osmotic pressure intracellular H2O cell swelling.</li> </ol> Signup and view all the answers

cloudy swelling

mild degeneration characterized by cell swelling and granularity of the cytoplasm due to intracellular accumulation of water. Signup and view all the answers