Receptor diversity

Receptors have diversified in order to have specific responses by the various organs of the body.

As can be seen in the graphic, there are many subtypes of the receptors associated with the autonomic nervous system.


Alzheimer's disease is characterized by a shortage of acetylcholine in the synaptic cleft, or a shortage of acetylcholine neurons. Which of the following drug mechanisms is a potentially useful medicine against Alzheimer's disease?