Physiology 2

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Physiology 2
2011-01-13 00:54:20

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  1. facilitated diffusion
    uses a transporter protien to get the molecule across the membranel. doesnt require ATP
  2. Active transport
    goes against the concentration gradiant one example is the Na and K pump, 2 Na in 3 K out or vice versa. Glucose transporter which one is against the concentration gradiant, the other one with the concentration gradiant.
  3. solute
    a desolved substance in the water (for osmosis) see hypo hyper and isotonic
  4. hypertonic
    high concentrations of solutes. if the solution around the blood cell is hypertonic the blood cell will shrink since the extra Na will go into the cell and make it more solute into the water.
  5. isotonic
    the water and the solute is equal to the enviroment in the cell and outside.
  6. hypotonic
    if the area around the cell is hypotonic it has more water then solute in the cell so the cell fills with water and explodes.
  7. exocytosis
    a vesicle transports something usually neurotransmitters to the outside of the cell
  8. endocytosis
    taking particles ususally neurotransmitters and reabosrb them back into the cell using a vesicle
  9. membrane potential
    the difference in the electrical charge between the inner and outter membrane. ions create the electrical charge
  10. Na equilibrium
  11. mV cell equilibrium
    -70 mV
  12. K equilibrium
  13. electrical synapse
    can go both ways bidirectional. (the intercalated discs in the heart is a ex.)
  14. chemical synapse
    unidirectional, use of chemicals and neurotransmitters
  15. axoplasmic transport
    neurotransmitters transported to the synaptic terminal
  16. anterograde
    movement toward the synaptic terminals
  17. retrograde
    movement toward the stoma of the neuron