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Lecture 13

Lecture 13 - Alcohol.docx

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Health Sciences
Health Sciences 1001A/B
Shauna Burke

Chapter 15 – Alcohol Lecture 13 Alcohol  Health Canada (2004): o 79.3% of Canadians reported alcohol consumption in past year o 44% reported drinking weekly o Males more likely than females to report drinking in past year o Highest drinking rates among 18-24 year olds o 95% of university students consume alcoholic beverages (Addiction Research Foundation) o Through automobile crashes and other injuries, alcohol is the leading cause of death among people ages 15-24  Ethyl alcohol is the common psychoactive ingredient in all alcoholic beverages  When consumed, alcohol is absorbed into the bloodstream from small intestine, stomach, colon  It is then distributed throughout the body’s tissues, affecting nearly every body system  Main site of alcohol metabolism = liver o Transforms alcohol into energy and other products  Body can metabolize 1/2 - 3/4 of a drink in 1 hour although varies widely  If more alcohol is consumed than is metabolized, blood alcohol concentration (BAC) will steadily increase, as will level of intoxication BAC depends on:  Sex  Weight  Body fat o Alcohol is not diffused into body fat as rapidly as muscle tissue o People with greater body fat will be more drunk because alcohol will stay in their blood longer o Small body will have great BAC then bigger body  Water content in body’s tissues  Concentration of alcohol in beverage  Rate of consumption  Volume of alcohol consumed Effects of Chronic Use of Alcohol • Average lifespan of alcohol abusers is 10-12 years shorter than that of non-abusers o Health effect of alcohol and injuries are what cause this • Cirrhosis: o Liver cells are destroyed and replaced with fibrous scar tissue (fibrosis) • Inflammation of pancreas causing nausea, vomiting, abnormal digestion, abdominal pain • Cardiovascular problems o High blood pressure, weakening of heart muscle • Related to oral cancer, cancers of the esophagus, liver, stomach, pancreas, possibly breast cancer • Linked to asthma, gout, diabetes, recurrent infection, nutritional deficiencies, nervous system diseases • Psychiatric problems - paranoia, memory gaps • Drinking during pregnancy can result in miscarriage, stillbirth, fetal alcohol syndromes, or alcohol related neurodevelopment disorder o Small at birth, heart defects, abnormal physical features (small, wide-set eyes), mentally impaired o Most common preventable cost of mental impair
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