How a Neural Synapse Works
A neural synapse is the junction where one neuron communicates with another. This visualization shows how neurotransmitters cross the synaptic cleft and bind to receptors on the receiving neuron.
About This Video
This OSHACode® visualization shows a cross-section of a neural synapse, the specialized junction where neurons communicate with one another.
The animation illustrates neurotransmitters being released from synaptic vesicles in the presynaptic terminal, traveling across the synaptic cleft, and interacting with receptors on the postsynaptic membrane. This chemical signaling process allows information to be transmitted through the nervous system.
Understanding normal neural communication also provides a foundation for understanding how certain hazardous chemicals can interfere with nervous-system function.
This video is part of the OSHACode® HAZWOPER Visual Library, a collection of technical safety, environmental, and scientific visualizations designed to make complex concepts easier to understand.
How Do Neurons Communicate Across a Synapse?
When an electrical signal reaches the presynaptic terminal, it can trigger synaptic vesicles to release neurotransmitters. These chemical messengers enter the synaptic cleft and travel the short distance to the postsynaptic cell.
Neurotransmitters then bind to specific receptors on the postsynaptic membrane. Depending on the neurotransmitter, receptor, and signaling pathway involved, this interaction can influence the electrical or biochemical activity of the receiving cell.
Why Does This Matter in HAZWOPER Toxicology?
Some hazardous substances can disrupt normal nervous-system signaling. Depending on the substance and mechanism of toxicity, chemicals may alter neurotransmitter release, receptor activity, neurotransmitter breakdown, ion-channel function, or other processes required for normal neural communication.
Understanding how a normal synapse functions helps explain why exposure to certain neurotoxic substances can produce neurological effects.
