Synapse nerve junctions. Coloured scanning electron micrograph (SEM) of nerve cells showing the synapses (junctions,bulges) between them. At a synapse an electrical signal is transmitted from one cell to the next in only one direction. When an electrical signal reaches a synapse it triggers the release of neurotransmitter chemicals from vesicles (yellow) in the presynaptic cell. The neurotransmitters cross a microscopic gap called the synaptic cleft and bind to receptors on the postsynaptic cell,causing it to propagate an electrical impulse | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Deerinck, Thomas / NCMIR |
Taille de l’image : | 4724 px × 3720 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |