Acetylcholine produces its physiological effects by acting on two main classes of receptor subtypes: nicotinic and muscarinic receptors.

This statement is **false**. The supplied material defines neurotransmitters generally and names acetylcholine, but it does not provide receptor subtypes or specific physiological effects for acetylcholine. A careful interpretation should distinguish information explicitly present from details that would require additional course material.\n\n**Key takeaway:** The slides establish the basic definition and example, not detailed acetylcholine mechanisms.\n\n**Glossary:** **Receptor subtype**: A particular form of a receptor; **physiological effect**: A change in the functioning of an organism or tissue.