modeling nerve cells: transmitting messages with weak electrical currents. concept science,

nerve cells neurons electrical signals brain nervous system synapses dendrites axons action potential neurotransmitters ion channels membrane depolarization repolarization hyperpolarization resting voltagegated sodium potassium calcium chloride neurotransmission synaptic cleft neurotransmitter release postsynaptic excitatory inhibitory graded myelin sheath schwann oligodendrocytes nodes ranvier saltatory conduction vesicles transmission neuromodulators neuromuscular aigenerated