Psychology 2020A/B Midterm: Psychology 2020 Test 2 Notes.docx
15 Dec 2013
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1,3,7-trimethylxanthine (caffeine"s chemical name) is one of several methylxanthines: theophylline, theobromine, dimethylxanthine. Caffeine is most common drug for psychoactive effects. Canadian daily consumption average 70 mg. Plants that contain methylxantines: coffee, tea, yerba mate, guarana, kola nut and cacao: yerba mate: steeping the leaves like tea, guarana: brewing the roasted berries like coffee, caffeine of guarana is twice that of coffee. Tea popular in england and russia: russia, tea in large urns called samovars. British forced chinese to accept opium in payment for tea: opium wars of mid 1800"s. First tea shipment to canada by hudson"s bay company 1716. Tea contains theophylline, small amounts: theophylline is equally potent to caffeine as a stimulant. Ethiopian or yemenite goat herder noticed goats in state of behavioral excitation. Traced to berries of a plant they have eaten. Early periods, berries were chewed and fermented juice was drunk: later roasting beans and grinding spread in africa and middle east.
