Science Images

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Nucleus raphe magnum of a rat. Confocal microscope image showing neurons containing serotonin and norepinephrine. By Hermes Solenzol. 

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Neurons in the central amygdala of a mouse marked by expression of the fluorescence protein mCherry. These neurons express the neuropeptide corticotropin-releasing factor (CRF). The body of one of the neurons is overexposed, but the synaptic spines on the dendrites are visible. Confocal microscopy image taken by Hermes Solenzol. 

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Dorsal horn of a rat spinal cord showing neurons with the mu-opioid receptor (green) and axons that contain enkephalins, a type of endorphin (red). Confocal microscope image by Hermes Solenzol.