New Impulses

    Cards (12)

    • A brief, large change in membrane potential during which the potential reserves so that the inside the cell rapidly and briefly becomes more positive than outside?
      Action Potential
    • Neurons send messages electrochemically
    • Nerve cells have a semi-permeable membrane
    • Important Ions:
      • Sodium
      • Potassium
      • Calcium
      • Chlorine
    • Nerve and muscles are excitable tissue
    • Membrane potential becomes less negative during depolarization
    • Membrane potential becomes more negative during hyperpolarization
    • Electrical signals are produced by changes in ion movement across the plasma membrane
    • Once a signal is received, the nodes will bring sodium in, and allow potassium out. This is the?
      Ion Exchange
    • The ion exchange cascades down the axon, exchanging ions one node after another, until it reaches the axon terminals
    • At the axon terminal, neurotransmitters are released to excite other cells
    • Could be other neurons, making them fire or, it could be effector cells, like muscles, that respond to this signal.