Place the following events involved in drug addiction in the correct sequence. 

I-The synapse becomes less sensitive, and normal function can only continue in the presence of the drug.
II-CNS responds to increased firing by decreasing the number of drug receptors on the cell membrane.
III-Drug molecule prevents receptor endocytosis and causes overstimulation of the postsynaptic cell.  

A.  I, II, III
B.  III, II, I
C.  II, III, I
D.  III, I, II


B.  III, II, I

Biology & Microbiology

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