Synaptic Transmission Diagram - Neurotransmitter Release and Receptor Binding #1820720 (License: Personal Use)

The image depicts a presynaptic neuron terminal (yellow) releasing neurotransmitter-filled vesicles (white circles with dots) into the synaptic cleft upon calcium influx (red arrows), where they bind to receptors (pink structures) on the postsynaptic membrane (green). Black dots represent neurotransmitter molecules diffusing across the cleft, while blue squiggles indicate intracellular signaling cascades triggered downstream. The curved black arrow signifies vesicle recycling via endocytosis.

Used in educational materials, medical textbooks, or neuroscience websites to explain neuronal communication; matches user intent for learning basic neurophysiology or preparing teaching resources.