Add marijuana to humans, and you get some fairly predictable results: euphoria, hunger, introspection, anxiety, and a whole panoply of other effects. Also known as being high. Most of that complicated reaction is thanks to a single cellular structure known as cannabinoid receptor 1. Your body has CB1 receptors lacing the surfaces of cells in the brain, liver, lungs, fat, uterus, and sperm. And whenever your .

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