Exam 1: Modules Flashcards
atrophy
decreas in size due to loss of nerbe innervation or use
hypertrophy
cell gets larger and is remodeled
metaplasia
reversible and a result of inflammation; change form to adapt and survive
dysplasia
abnormal, deranged cell growth varying in size shape and organization (precursor to cancer)
causes of cell injury
phsyical agents (hypozia/extremes in temp/electricity), radiation, chemicals, biological agents, nutrtional imbalances
glycolysis
the process of turning food into energy
done in ten enzymatic reactions
oxidative phosphorylation
mitochondria uses oxygen to make ATP
without ATP –> rest of the cells will not function
hypoxia causes this
WIthout atp NA K pump will not work
sodium is retained causing swelling, rough er swells and stop making proteins….switches to anaerobic
What happens in anaerobic
lactic acid (decrease ph, destroy)
WIthout atp calcium pump will not work
calcium retained… can release protease which damages proteins (membrane proteins aka transporters) and cytoskeletin and nuclease which destroys nucleus and dna.
calcium can get into mitochondria, creating permeability, and leakage of Cytochrome C…a red flag and creates apoptosys
As the cell becomes acidic
phospholipids are released and destroy cell membrane
A free radical is an uncharged atom or group of atoms having an unpaired ____
electron
examples of antioxidants are
adek, superoxide, selenium, and beta carotene
Free radicals can be blocked by antioxidants or broken down by
enzymes (an example catalase contained in peroxisomes)