An action potential is self-regenerating because __________.repolarizing currents established by the efflux of Na+‎ flow down the axon and trigger an action potential at the next segmentrepolarizing currents established by the efflux of K+‎ flow down the axon and trigger an action potential at the next segmentdepolarizing currents established by the influx of K+‎ flow down the axon and trigger an action potential at the next segmentdepolarizing currents established by the influx of Na+‎ flow down the axon and trigger an action potential at the next segment
  • depolarizing currents established by the influx of Na+ flow down the axon and trigger an action potential at the next segmentrationale: The Na+‎ diffusing into the axon during the first phase of the action potential creates a depolarizing current that brings the next segment, or node, of the axon to threshold.
  • Ca2+, which then causes release of neurotransmitter from the axon terminal
  • The inactivation gates of voltage-gated Na+‎ channels close in the node, or segment, that has just fired an action potential.
  • The dendrites provide a large surface area for connections from other neurons.
In which area of the neuron is an action potential initially generated?
  • C
  • the direction in which the nerve impulse travels relative to the central nervous system
  • Release hormones into the bloodstream to communicate with other cells in the body.
  • Myelinated axons with the largest diameter
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