Synapse nerve junctions. Coloured scanning electron micrograph (SEM) of a section through nerve cells showing their synapses,the junctions between two nerve cells. 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 | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Furness, Dr. David |
Bildgröße: | 4974 px × 3543 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |