Ch 12 neuron - Animal Physiology.txt

The flashcards below were created by user rincrocci on FreezingBlue Flashcards.

  1. Ch 12
  2. Action potential structure and effect
    • is a VOLTAGE GATED Channel
    • Electrical Signal that can generate in response to changes in membrane permeability of ions
    • Generates ALL-or-NONE responses to DEpolarization
  3. Steps involved in producing Action Potential
    • 1. Increase in Na INFLUX via opening of Na channels (depolarization occurs at hump around -40mV and graph increases as Na enters)
    • 2. Na channels closes (at peak, around 40mV)
    • 3. K channels open, allowing K OUTFLUX (repolarization occurs as hump decreases
    • 4. K channels close (hyperpolarization occurs as it gets negative on graph)
  4. Absolute refractory period
    After action potential, there is a period in which the ap cannot be enerated again (1ms)
  5. Na and Ca voltage gated channel structure
    Consists of polypeptide chain of four domains (each having six a helix segments) surrounding a central pore
  6. K voltage gate channel
    Four separate proteins, each having subunits similar to the Na and Ca channels. These four come together and look similar to the Na and Ca channels
Card Set:
Ch 12 neuron - Animal Physiology.txt
2014-03-01 22:54:02
neuron animal phys

Show Answers: