close up of a neuron's axon and dendrites with synaptic vesicles

human neuron axon dendrite synapse synaptic vesicles nervous system brain neurotransmitter cell biology science research microscopy neural signal transmission communication anatomy physiology medical healthcare neurology neuroscientist cognitive memory learning mental health psychology structure organelles molecular biochemistry genetics pharmacology medicine imaging model microscopic visual graphic art design abstract scientific educational close 39aph39 dendrites closeup view showing