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 B1a Fitness and health

  1. You should be thinking about the differences between health and fitness, concentrating on the causes and prevention of heart disease, which is the most common cause of death in the UK.

  2. Have ideas on encouraging a healthy lifestyle e.g. ways to reduce the risk of heart disease and high blood pressure e.g. give up smoking, avoid eating high levels of salt and avoid eating high levels of saturated fat.

  3. Know that the risk of developing heart disease can be increased by a number of factors, to include:

    • high blood pressure

    • smoking

    • eating high levels of salt

    • eating high levels of saturated fat.

  4. Be able to describe how cholesterol can restrict or block blood flow in arteries by forming plaques.

  5. Be able to analyse data that show the changing incidence of heart disease in the UK.

  6. Know that blood pressure measurements consist of diastolic and systolic data in mmHg.

    • Be able to explain why blood in arteries is under pressure - due to contraction of heart muscles so that blood reaches all parts of the body i.e the heart acts as a pump.

  7. HT only: Be able to explain the possible consequences of having high blood pressure.

  8. Be able to describe the factors that increase blood pressure:

    • being overweight

    • stress

    • high alcohol intake

    • smoking

  9. HT only: Be able to explain the possible consequences of having low  blood pressure.

  10. Be able to describe the factors that decrease blood pressure:

    • regular exercise

    • balanced diet.

  11. Be able to explain the difference between fitness (the ability to do physical activity) and health (free from disease).

  12. Analyse the results of different ways of measuring fitness (strength, stamina, flexibility, agility, speed and cardiovascular efficiency).

    • HT only: Be able to evaluate different ways of measuring fitness.

  13. Be able to explain how smoking increases blood pressure:

    • carbon monoxide reduces the oxygen-carrying capacity of the blood so heart rate increases to compensate,

    • nicotine increases heart rate.

    • HT only: Explain why carbon monoxide reduces the carrying capacity of red blood cells, using the idea that it
      combines with the haemoglobin preventing the oxygen transport.

    • HT only: Explain how narrowed coronary arteries, together with a thrombosis, increase the risk of a heart attack

  14. Be able to explain how narrowed coronary arteries, together with a thrombosis, increase the risk of a heart attack.

  15. Be able to explain how diet can increase the risk of heart disease to include:

    • saturated fats leading to a build up of cholesterol (a plaque) in arteries

      • be able to describe how cholesterol can restrict or block blood flow in arteries by forming plaques.

      • be able to suggest ideas on how to lower cholesterol intake

    • high levels of salt elevating blood pressure.

  16. Be able to interpret data showing possible links between the amount of saturated fat eaten, the build up of cholesterol plaques and the incidence of heart disease.

 

 

 

  • 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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