Final answer:
Stronger stimuli result in the release of more neurotransmitter during neurotransmission due to a larger influx of calcium ions, which elicits a more significant release of neurotransmitter molecules from synaptic vesicles through exocytosis.
Step-by-step explanation:
In response to the question, stronger stimuli release more neurotransmitter into the synaptic cleft. When a stimulus is strong enough to depolarize the neuron above the threshold, it triggers an action potential. As the action potential reaches the synaptic terminal, it leads to the opening of voltage-gated calcium channels and the influx of calcium ions, which in turn results in the release of neurotransmitters through a process known as exocytosis. Correspondingly, the magnitude of the stimulus can influence the amount of calcium entry, and thus, a stronger stimulus will generally cause more neurotransmitter to be released. The neurotransmitters, such as acetylcholine (ACh) at the neuromuscular junction, bridge the gap between the neuron and the postsynaptic membrane, ultimately impacting the likelihood of an action potential being generated in the post-synaptic neuron. Variations in this release, possibly due to controlled stimulation or dysfunction, significantly affect neurological responses and subsequent behaviors or actions.