-Refer to the Figure for the Following Question: Drug Addiction

Multiple Choice

-Refer to the figure for the following question: Drug addiction is characterized by tolerance, in which the user must ingest more of the drug to obtain the same effect. Cellularly, tolerance can be explained by the fact that prolonged use of a drug such as cocaine leads to ________ in the number of receptor proteins present in the postsynaptic neuron.

A) an increase
B) a decrease
C) no change
D) a regulation