Maddie planned to go for a swim after dinner. But, after a large meal, she decided to rest rather than swim. What neurotransmitter promotes rest by binding muscarinic receptors after her meal?

Acetylcholine

Explanation:

Acetylcholine is the neurotransmitter that promotes rest by binding muscarinic receptors after a meal. This neurotransmitter is used at the neuromuscular junction, and it is released by the motor neurons of the nervous system in order to activate muscles. This is most likely the reason why Maddie does not want to go swimming after eating.