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Lecture 12

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Health Sciences
Health Sciences 1001A/B
Shauna Burke

Chapter 15 The Responsible Use of Alcohol Alcoholic Beverages - Form of alcohol referred is ethyl alcohol - Ethanol = psychoactive ingredient in all type of alcoholic beverages - Canada: beverage containing 1.1% or more alcohol by volume is considered an alcoholic beverage - Standard drink vs actual servings o Actual drink = 13.6g of alcohol - Typical serving of most alcoholic beverages = larger than single standard drink - - Caloric content o 7 calories/g o One drink = 14-17g so 100-120 calories o 1 beer = ~150 calories o Light beer = ~100 calories but has same alcohol content Absorption - 20% rapidly absorbed from stomach - 75% absorbed in upper part of small intestine - Any remaining absorbed in gastrointestinal track - Rate of absorption affected by o Food in stomach o Alcohol concentration o Eventually all alcohol ingested will be absorbed - Take vitamin to help with morning after Metabolism and Excretion - Main site of metabolism is liver - Small amount metabolized in stomach - Variances in alcohol-metabolizing enzymes explain why people have different reactions to alcohol - Alcohol’s effects become permanent resulting in lasting disruption of brain function and changes in brain structure Alcohol Intake and Blood Alcohol Concentration - Blood alcohol concentration: measure of intoxication o Determined by amount of alcohol consumed in given amount of time o Influenced by individual factors  Ex. body weight, percentage body fat, sex, rate of alcohol metabolism due to genetic factors and drinking behavior - Food can slow rate of alcohol absorption o Metabolic rate cant be influenced by exercising, breathing deeply, eating, drinking coffee, or taking other drugs Immediate Effects of Alcohol on Health - Low concentration (BAC of 0.03%-0.05%) produce feelings of light- headedness, relaxation, release of inhibitions - Higher concentration (BAC of 0.1%-0.2%) = interference with motor coordination, verbal performance, intellectual function - BAC 0.35% induce coma o Any higher can be fatal - Alcohol hangover caused by combination of toxic products of alcohol breakdown, dehydration, hormonal effects - Alcohol poisoning occurs more frequently than most people realize - Using alcohol with other drugs is leading cause of drug-related deaths - Alcohol-related injuries and violence – result of impaired judgment, weakened sensory perceptions, reduced inhibitions, impaired motor coordination, increased aggressiveness and hostility - Alcohol associated with more acts of aggression and violence than any other legal or illegal drug - Serious affect ability to make wise decision about sex Drinking and Driving - Canada: drinking and driving remain single largest criminal cause of death - Highest rate of impaired driving deaths occur at age 19 - Dose-response function o Driving with BAC of 0.14% = more than 40 times lik
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