Biology - Neuroscience - Basic - Synapses and neurotransmitters - Synaptic Transmission
6-step animation of chemical synapse. Step 1: 'ACTION POTENTIAL arrives at the synaptic knob (presynaptic terminal).' Step 2: 'CALCIUM INFLUX: Voltage-gated Ca²⁺ channels open. Ca²⁺ floods into the synaptic knob.' Step 3: 'VESICLE FUSION: Ca²⁺ triggers synaptic vesicles (containing neurotransmitter