Move your mouse over the diagram and links to receptor detail will be displayed in the status bar of your browser. Click on the ganglia (N1-nictonic receptors), the sympathetic nerve enplate (alpha-2 adrenergic receptors) coupled to decrease of cAMP), or parasympathetic postganglionic endplate region (M1-muscarinic receptors) for a detailed description of the neurotransmitters and receptors involved.