Chapter 7 & 8 Flashcards
Fermentation
sugars are dissolved into water and exposed to air, alcohol & carbon dioxide by the action of various yeasts, molds, or bacteria on carbohydrates.
Fermented beverages don’t contain about 15% alcohol. The percentage of ethanol depends on sugar-containing substance used (grapes are used, grape juice ferments to wine; when grains are used, fermentation produces beer)
Distillation
developed to INCREASE ethanol content of fermented beverages
process of heating a fermented mixture to increase alcohol content— for hard liquor
Temperance Movement `
(19th century) America expanded westwards
saloon–aggressive men exploited other men and women)
Temperance Movement reborn against consumption of alcoholic beverages
Prohibition
1920’s - 18th amendment to the constitution banning the sale of alcohol
-widespread disrespect for prohbition laws led to lawless behavior
21st amendment- repealed prohibition in 1933
Epidemiology of AUDs in the U.S.
twice as common in men than women
- 4-7.7% for past year
- 2-23.5% for lifetime
Alcohol Prevalence in The US`
Alcohol Prevale nce in the US90% ever drank 65% current drinkers 70% men and 60% women >40% report temporary problems 10-20% alcohol abuse 5-15% dependence (lifetime)
Heavy Drinking in the US
bingeing 4/5 cutoff in 2 hours
bingeing regularly (1-2 x a week)
Almost 7% of the national sample reported heavy drinking in the last month (3 x more men than women)
15% of 18-25 yr olds reported heavy drinking (heaviest among white males)
Alcohol Sites of Action
Alcohol affects cell membranes, all neurochemical systems, and all endocrine systems
- Depresses the CNS
- Dissolves in all lipid membranes, disrupting the normal chemical actions that occur and alters the cell membranes’ anatomy by entering their internal structure
- reduced efficiency of conduction of neural impulses along axons, reducing the action potential amplitude that reaches the synapse
Alcohol Pharmacology
nhances the inhibitory effect of GABAAt high doses, it blocks the effects of the excitatory transmitter glutamate
Alcohol Half-Life
Metabolism of alcohol is relatively constant
10-14ml of pure alcohol an hour
or about 1 drink an hour (~.015g/dl)
Thus, the half-life of alcohol is NOT fixed
It depends entirely on the dose
Pylorospasm
The shutting down of the pylorus valve that occurs in some people when they drink very large quantities of alcohol
Natural defense against a person becoming a heavy drinker
Only 10-20% of alcohol in the stomach is absorbed therefore large amounts of alcohol may remain in the stomach unabsorbed when pylorospasm occurs
1 standard drink
0.5 ounces of alcohol = a standard drink This is 1 oz of whiskey (90-100 proof) 12 oz of (4% alcohol beer) 4 oz of wine (12% alcohol)
BAC
concentration of alcohol in the body from its concentration in the blood—amount of alcohol in the bloodstream
BAC rises quickly and then more gradually returns to zero after drinking stops; Time is important factor in determing BAC.
Alcohol is metabolized general at a constant amount over a given time, regardless of amount drunk
Disulfiram
treatment of alchol interferes with the metabolism of alcohol so that people soon feel very ill if they drink while on a regimen of disulfiram; the drug may be used as part of a treatment program for alcohol dependence
Alcohol Detoxification
treatment of alcohol withdrawal without the use of medicine