How do impulses travel across a synapse?
1 Answer
Neurotransmitters (small molecules)
Explanation:
When the impulse (or 'action potential') reaches the presynaptic terminal (the end of the neuron), it causes a number of vesicles containing neurotransmitters to be released into the synaptic cleft (the bit between the two neurons).
These neurotransmitters diffuse across the synaptic cleft before binding to receptors on the postsynaptic neuron.
