n heavy users. As for the effect that THC has on the brain, it suppresses neurons in the information processing system of the hippocampus, the part of the brain that is crucial for learning, memory, and the integration of sensory experiences with emotions and motivation. Many marijuana smokers believe that their senses are heightened by the drug. In fact, the brain is dulled, not enhanced. Marijuana usage can thus result in problems with memory and learning, distorted perception, loss of coordination, and trouble with thinking and problem-solving. However, the effects of the drug are dependent on the user's experience, how much THC is in the marijuana, how the drug is taken, and whether it is taken with other drugs or alcohol. More obvious effects of the drug are a dry mouth, increase in heartbeat, slow reaction time, and the blood vessels in the eyes expand. The air tubing in the lungs relax and become larger as more oxygen enters the blood. Most users will experience feelings of relaxati
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