Dopamine receptors are of five types and they are named—you would never have guessed it–D1, D2, D3, D4 and D5. D1 and D2 receptors are the most prevalent ones of the five subtypes. These receptors are considered to be in two groups: 1. The D1 family: D1 and D5 receptors 2. The D2 family: D2, D3,…