Doc Brown's GCSE OCR Gateway Science-Biology Revision Notes

PLEASE NOTE NEW revision summaries for the NEW OCR Gateway Science A GCSE Biology and NEW OCR GCSE Gateway Combined Science A Biology courses: Revision for Paper 1 (Topics 1-3) and  Paper 2 (Topics 5-6) STARTING with Y10 in Sept. 2016 onwards, first exams in 2018

OCR GCSE Gateway Science Biology Module B1 Understanding Organisms

Unit-Item B1e Drugs and you

  1. Appreciate that most teenagers are exposed to many influences that encourage their natural urge to experiment, including drugs.

  2. You are expected to have some scientific knowledge and explanations of drugs, their effects and the risks involved.

  3. Be aware that many drugs are also used legitimately and some of these are considered in this topic.

  4. You should know about the use of contemporary scientific and technological developments in the detection and analysis of different drugs used in sport.

  5. Be able to discuss how scientific knowledge and ideas change over time when investigating the link between smoking and lung cancer.

  6. Recognise that drugs can be beneficial or harmful.

  7. Be able to explain why some drugs are only available on prescription.

  8. Be able to explain the terms

    • a) addiction

    • b) withdrawal symptoms

    • c) tolerance

    • d) rehabilitation.

  9. Describe the general effects of each drug category:

    • a) depressants: slow down brain’s activity

    • b) pain killers: block nerve impulses

    • c) stimulants: increase brain’s activity

    • d) performance enhancers: muscle development

    • e) hallucinogens: distort what is seen and heard.

  10. Revise the smoking machine experiment to compare high, medium and low tar brands.

  11. Know of the clear evidence of the link between smoking and lung cancer.

  12. Be able to appreciate and discuss the current anti-smoking laws.

  13. Know that that tobacco smoking can cause:

    • a) emphysema

    • b) bronchitis

    • c) cancer (mouth, throat, oesophagus and lung)

    • d) heart disease.

  14. Describe the effects of:

    • a) carbon monoxide (lack of oxygen, heart disease)

    • b) nicotine (addictive)

    • c) tars (irritant, carcinogenic)

    • d) particulates (accumulation in lung tissue).

  15. Appreciate the dangers of drink driving.

  16. Recognise the short term and long term effects of alcohol on the body:

    • a) short term effects - impaired judgment, balance and muscle control, blurred vision, slurred speech, drowsiness and increased blood flow to the skin,

    • b) long term effects - liver and brain damage, both of which can prove fatal.

  17. Be able to explain why there is a legal limit for the level of alcohol in the blood/breath for drivers and pilots.

  18. Be able to explain the basis of the legal classification of drugs:

    • a) Class A being the most dangerous with the heaviest penalties

    • b) Class B

    • c) Class C being the least dangerous with the lightest penalties.

  19. Know examples of drugs and their function:

    • a) depressants, limited to alcohol, solvents and tamazepam

    • b) pain killers, limited to aspirin and paracetamol

    • c) stimulants, limited to nicotine, ecstasy and caffeine

    • d) performance enhancers, limited to anabolic steroids

    • e) hallucinogens, limited to LSD.

  20. HT only: Explain the action of depressants and stimulants on the synapses of the nervous system:

    • a) depressants bind with receptor molecules in the membrane of the next neurone blocking the transmission of the impulses

    • b) stimulants cause more neurotransmitter to cross the synapse.

  21. Be able to describe how cigarette smoke affects ciliated epithelial cells lining the trachea, bronchi and bronchioles.

  22. Be able to explain why damage to ciliated epithelial cells can lead to a ‘smokers cough’.

  23. HT only: Be able to evaluate data on the effects of smoking in populations (to include, cancer, heart disease, emphysema and birth weights of babies born to mothers who smoke).

  24. Be able to interpret data on the alcohol content (measured in units of alcohol) of different alcoholic drinks.

  25. Be able to interpret information on reaction times, accident statistics and alcohol levels.

  26. HT only: Be able to describe how the liver can become damaged as it removes alcohol (cirrhosis), to include:

    • a) enzymes in liver breakdown alcohol

    • b) toxic products of alcohol breakdown cause liver damage




  • OCR GCSE Gateway Science BIOLOGY Module B1 Understanding Organisms

  • When revising, these pages provide you with a summary of what you need to know and be able to do.

  • BUT remember, your primary source of revision are your class notes, investigations and OCR GCSE Gateway science textbooks and classwork worksheets as well as examination practice with past papers.

  • PLEASE NOTE My NEW GCSE (9-1) BIOLOGY REVISION SUMMARIES for Y10 2016-2017 onwards

    AQA GCSE Biology 8461  1st Paper (Topics 1-4 & Combined Science Trilogy Biology 1 Topics 1-4)

    AQA GCSE Biology 8461  2nd Paper (Topics 5-7 & Combined Science Trilogy Biology 2 Topics 5-7)

    Edexcel GCSE (9-1) Biology 1st Paper (Topics 1-5 & Combined Science Biology 1 Topics 1-5)

    Edexcel GCSE (9-1) Biology 2nd Paper (Topics 1, 6-9 & Combined Science Biology 2 Topics 1, 6-9)

    OCR (9-1) Gateway Science GCSE Biology A 1st Paper (Topics B1-3 & Combined Science A Biology 1 Topics B1-3)

    OCR (9-1) Gateway Science GCSE Biology A 2nd Paper (Topics B4-6 & Combined Science A Biology 1 Topics B4-6)

    OCR (9-1) 21st Century Science GCSE Biology B Chapters B1-3 (Chapters B1-3, GCSE Combined Science B biology)

    OCR (9-1) 21st Century Science GCSE Biology B Chapters B4-6 (Chapters B4-6, GCSE Combined Science B biology)

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