Brain synapses. Coloured transmission electron micrograph (TEM) of a section through brain tissue showing a number of synapses. A synapse is a junction between two nerve cells. At a synapse an electrical signal is transmitted from one cell to the next in only one direction. When the signal reaches a synapse it triggers the release of neurotransmitter chemicals from synaptic vesicles (red) at the end of the presynaptic cell. The neurotransmitters cross a microscopic gap and bind to receptors on the post-synaptic cell,triggering an impulse in that cell. Magnification: 30,000 when printed 10 centimetres wide | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Gschmeissner, Steve |
Bildgröße: | 5194 px × 3366 px |
Modell-Rechte: | nicht erforderlich |
Restrictions: | - |