Caption: Excitatory (asymmetric) synapses on a neuron dendrite (central nervous system). Two axon terminals (light blue) form excitatory synapses on a dendrite (light yellow). Chemical synapses are specialized "junctions" through which nerve cells signal one another or other non-neuronal cells such as muscles. At a typical synapse an axon and a dendrite flank each other across a slender gap (synaptic cleft; red). Signaling molecules, known as neurotransmitters, are contained in tiny vesicles of the axon (blue). Neurotransmitters pass rapidly from axon to dendrite triggering an electrical impulse.
Magnification*: x16,245
Type: TEM
Copyright 1999 Dennis Kunkel Microscopy, Inc.
Keywords: asymmetric,axon,central nervous system,CNS,dendrite,excitatory,neuron,synapse,nerve cell,TEM,synaptic vesicle,synaptic vesicles,10.01.07,1962A