Excitatory (asymmetric) synapses on a neuron dendrite (mammal central nervous system), transmission electron micrograph (TEM). Two axon terminals form excitatory synapses on a dendrite. 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). Signalling molecules, known as neurotransmitters, are contained in tiny vesicles of the axon. Neurotransmitters pass rapidly from axon to dendrite triggering an electrical impulse. Magnification: x16, 245 when shortest axis printed at 25 millimetres. | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / DENNIS KUNKEL MICROSCOPY |
Taille de l’image : | 5197 px × 4131 px |
Model Release : | Non requis |
Property Release : | Non requis |
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