Drug 'X' is chemically diacetylmorphine, which is synthesized by the acetylation of an extract obtained from a specific plant. Identify the correct plant source of this extract and the specific locations of the receptors for drug 'X' in the human body.

Step-by-step solution

Drug 'X', which is chemically diacetylmorphine, is commonly known as heroin. It is synthesized by the acetylation of morphine. Morphine is extracted from the latex of the poppy plant, Papaver somniferum. Heroin binds to specific opioid receptors, which are located in the central nervous system (CNS) and the gastrointestinal (GI) tract. Cannabinoids interact with receptors mainly in the brain and affect the cardiovascular system, while cocaine is obtained from Erythroxylum coca. Answer: Latex of Papaver somniferum;