part 2 Flashcards
(21 cards)
Microbial Pathogens
Bacteria and Viruses
Bacteria
produce toxins
Viruses
“kills cells from within”
Cell Adaptations
occurs after prolonged exposure to adverse or exaggerated normal stimuli
Main forms of Adaptation are:
Atrophy
Hypertophy or Hyperplasia
Metaplasia
Intracellular Accumulations
Atrophy
Decrease the size of a cell, tissue, organ, or entire body. which can be physiologica and predictable (after puberty), or pathological (lack of nutrition).
Hypertrophy
enlarged cells
Hyperplasia
increased number of cells in a tissue or organ.
Intracellular Accumulations
Exogenous materials and Endogenous Metabolites
Death
Somatic Death
Necrosis
Apoptosis
Somatic Death
“brain death” when tissues undergo autolysis
Necrosis
localized death of cells or tissues
Apoptosis
programmed death of single cells
Types of Necrosis
Coagulative
Liquefactive
Caseous
Enzymatic
Coagulative
most common
Liquefactve
in brain
Caseous
tuberculosis
Enzymatic
acute pancreatitis
Caclifications
Dystrophic and Metastatic
Dystophic
necrotic tissue attracts calcium salts and becomes calcifies
Metastatic
hypercalcemia followed by deposition of calcium salts in normal tissue.