Assertion: acetylcholine | /r/HasAspect | important role
Facets:
Source sentences:
text: Based on these initial findings, it is likely that acetylcholine has an important role to play in cognition, learning and memory — although the conflicting evidence suggests that its role is complex, and is not as simple as “more acetylcholine = better”!
text: For example, acetylcholine is released by motor neurons to activate muscles; acetylcholine also has an important role in arousal, attention, learning, memory and motivation.