Question What is the primary psychoactive component in marijuana? Answers THC TMJ MRT AAP Explanation The main psychoactive substance in marijuana is called tetrahydrocannabinol, or THC. This questions appears in the following tests: Colorado Motorcycle Practice Test 21 Connecticut Motorcycle Practice Test 7 District Of Columbia Motorcycle Practice Test 18 Iowa Motorcycle Practice Test 21 Iowa Motorcycle Practice Test 19 Maine Motorcycle Practice Test 50 Maine Motorcycle Practice Test 46 Massachusetts Motorcycle Practice Test 25 Massachusetts Motorcycle Practice Test 8 Minnesota Motorcycle Practice Test 35 Minnesota Motorcycle Practice Test 4 Montana Motorcycle Practice Test 17 Nevada Motorcycle Practice Test 25 New Hampshire Motorcycle Practice Test 4 New Jersey Motorcycle Practice Test 21 New Jersey Motorcycle Practice Test 20 New Mexico Motorcycle Practice Test 16 North Dakota Motorcycle Practice Test 25 Oregon Motorcycle Practice Test 9 Oregon Motorcycle Practice Test 23 Texas Motorcycle Practice Test 18 Vermont Motorcycle Practice Test 4 West Virginia Motorcycle Practice Test 2