Final answer:
During intense competition, neurotransmitters such as epinephrine, acetylcholine, dopamine, serotonin, and glutamate are likely released. These neurotransmitters are involved in the 'fight or flight' response, as well as focus, motivation, and memory, which are critical during a competitive meet.
Step-by-step explanation:
During a competitive meet, Sam's body is likely experiencing high levels of stress and exertion, which would result in the release of certain neurotransmitters at synapses within his nervous system. Some key neurotransmitters that would likely be involved include epinephrine and acetylcholine. Epinephrine, often associated with the 'fight or flight' response, is released by postganglionic sympathetic fibers and will bind to adrenergic receptors. Acetylcholine is typically released by postganglionic parasympathetic fibers and will bind to muscarinic receptors. These neurotransmitters help the body respond to high-intensity situations by adjusting heart rate, breathing rate, and energy availability, among other physiological responses.
Other neurotransmitters like dopamine, serotonin, and glutamate could also be released, playing roles in cognitive functions such as focus, motivation, and memory, all of which are important during competition. Additionally, synaptic transmission is fundamental for these communications, where neurotransmitters released at the chemical synapse are quickly degraded or reabsorbed, allowing for the efficient relay of signals and rapid response to stimuli.