Acetylcholine<span>Distributed throughout central nervous system. Involved in arousal, attention, memory, motivation, and movement. Involved in muscle action through presence at neuromuscular junctions. Degeneration of neurons that produce Ache is linked to Alzheimer's disease. Too much ACh- spasms, tremors, too little- paralysis or torpor.</span>
Most probably these scientists will do more studies and experiments in order to learn more about the subject. For example, if they compare plastic grocery bag with paper grocery bag it is important to investigate which one is a better resource use in the life cycles, which one is better for manufacturing or whether one of them can be reused. There are many questions about this issue.