Transcript ALCOHOL - science

GCSE Core Science
Human Biology
ALCOHOL COMA,
LIVER DAMAGE,
BRAIN DAMAGE
GCSE Core Science
Objectives
Human Biology
By the end of the lesson I:
•Know that alcohol is a legal for anyone over 18 in UK
•Know that alcohol can cause serious health problems for some users
•Know that alcohol is a recreational drug
• Know that alcohol causes many more problems in our society than
illegal drugs such as heroine and cocaine because it is so widely used
Starter
GCSE Core Science
What does this
mean to you?
Human Biology
GCSE Core Science
What is alcohol?
Human Biology
Alcohol is a family of related
substances, but most commonly refers
to ethanol – the active ingredient in
alcoholic drinks.
Alcohol is quickly absorbed into the
bloodstream, where it starts to have an
effect on the CNS.
The effects of alcohol vary from person to person and with
factors such as:
 rate of consumption
 level of food/water intake
 age and gender
 body weight/body fat.
GCSE Core Science
Does the amount you drink matter?
Human Biology
About 40% of admissions to hospital
A&E wards are related to alcohol
consumption, rising to 70% between
midnight and 5am at weekends.
Why does alcohol increase the risk
of accident or injury?
Alcohol slows down reaction times,
gives a false sense of confidence
and affects a person’s decisionmaking ability.
At high levels, alcohol causes vomiting, unconsciousness
and can even cause breathing to stop and lead to death.
I know alcohol is a legal, recreational drug causing serious health issues
GCSE Core Science
Task One
Human Biology
•Alcohol is a recreational drug that slows down the nervous system
and therefore slows your reaction time.
Why would this be a problem?
•Too much alcohol leads to a loss of self control, lose consciousness
or fall into a coma.
•The use of alcohol over a long period of time will lead to liver
damage (called cirrhosis of the liver) and brain damage.
GCSE Core Science
Short-term effects
Human Biology
Small amounts of alcohol cause a person to feel relaxed and
less inhibited. It can therefore appear to stimulate people.
However, further consumption has a depressant effect,
making reactions uncoordinated and impairing speech.
Alcohol is a diuretic, which
means it causes more urine
to be produced than normal.
This can lead to
dehydration, which
contributes to a hangover!
Alcohol also makes blood vessels dilate, leading to heat loss.
I know alcohol is a legal, recreational drug causing serious health issues
GCSE Core Science
Task One
Human Biology
•Your liver removes all the poisons you put in your body. It takes
them out of your blood, breaks them down and sends the off to be
excreted.
•If you drink too much alcohol, your liver cannot cope with the
amount of poisons.
GCSE Core Science
Human Biology
I Know alcohol causes many problems in society because it is so widely used.
GCSE Core Science
Human Biology
Use the relevant pages in your textbook to write an
explanation paragraph on
‘What is the problem with drug abuse?’
Include issues with legal/illegal drugs, smoking,
alcohol and harder drugs.
You may want to use question 2 and 3 to help
construct your answer
GCSE Core Science
Human Biology
GCSE Core Science
Objectives
Human Biology
By the end of the lesson I:
•Know that alcohol is a legal for anyone over 18 in UK
•Know that alcohol can cause serious health problems for some users
•Know that alcohol is a recreational
• Know that alcohol causes many more problems in our society than
illegal drugs such as heroine and cocaine because it is so widely used