the image shows a detailed close-up of a glowing red neuron, its multiple dendrites extending outward against a dark background

neuron nerve cell fiber axon dendrite synapse neurotransmitter neuroglia glial myelin sheath schwann oligodendrocyte node ranvier action potential resting depolarization repolarization hyperpolarization sodium channel potassium voltagegated ligandgated ion membrane electrochemical gradient neural transmission synaptic cleft vesicle neurotransmission