B1: Understanding Organisms Revision List

GCSE Biology B1 AQA (OCR B711) Understanding Organisms

Core Science revision for the new GCSE Science 9-1 course relevant to the AQA and OCR exam boards. If you are revising for your GCSE Biology B1  9-1 exam then this is a great place to start.

B1: Understanding Organisms Revision List

October 21, 2017 admin

B1A FITNESS AND HEALTH

Blood pressure and how to measure it, diastolic, systolic.

  • Consequences of high and low blood pressure
  • Carbon monoxide reduces the oxygen carrying capacity of red blood
  • Fitness and its link to blood pressure
  • Types of fitness (HT)

Heart disease

  • Causes of heart disease
  • Symptoms of heart disease
  • Effects of high blood pressure
  • Cholesterol , plaque, thrombosis (ht), salt, carbon monoxide, (ht) smoking.

B1B HUMAN HEALTH AND DIET

Protein carbohydrates and fats

  • Uses of macronutrients
  • Food tests
  • Components of a balanced diet. Protein, Carbohydrates and fats, minerals (limited to iron), vitamins (limited to vitamin c), fibre water.
  • Calculate personal estimated average daily requirement (EAR) for protein, Body Mass
  • Index
    First (animal) and second class proteins (HT)

Obesity and deficiency

  • Causes of obesity
  • Effects of dietary deficiency
  • Prevention of obesity and deficiency

B1C STAYING HEALTHY

Pathogens and causes of disease

  • Types of pathogen
  • Classification of disease by pathogen.
  • How diseases are spread
  • protozoa – malaria; Cholera = bacteria ; Athletes foot = fungus ; Flu = virus.

Cancer and non infectious disease

  • Types of cancer
  • Causes of cancer including carcinogens and genetic effects
  • Lifestyle and cancer risk
  • Treatments for cancer
  • Difference between benign and malignant tumours.

Prevention of disease

  • Hygiene
  • Healthy diet and it’s link to prevention of disease
  • Vaccination

Immunisation and testing of drugs

  • History of vaccines
  • Social issues with vaccination
  • Herd immunity
  • How drugs can be used to fight disease

How vaccines work.(HL)

  • Harmless pathogen given which carries antigens
  • Antigens trigger immune response by white blood
  • Cells which produce antibodies
  • Immunity remains (memory cells produced)

Testing drugs

  • Processes involved in getting a drug to market.
  • Animal testing
  • Placebos

B1D THE NERVOUS SYSTEM

The eye and senses

  • The five senses

How the eye works:

  • Cornea – refracts light
  • Iris – controls how much light enters pupil
  • Lens – focuses light on to retina
  • Retina – contains light receptors
  • Optic nerve – carries impulses to the brain.
  • Monocular Binocular vision
  • Long and short sightedness
  • Use of lenses to correct vision.

Nervous system and structure

  • Structure of neurones
  • The reflex arc
  • Function of neurones
  • Reaction times
  • Gap between neurones = Synapse (HL)

B1E DRUGS AND YOU

Illegal drugs

  • Legal versus illegal drugs
  • Differences between legal and illegal drugs. Class A class C
  • Harmful nature of all drugs
  • Social issues surrounding use of drugs

Key words associated with drugs.

  • Depressants: slow down brain’s activity
  • Pain killers: block nerve impulses
  • Stimulants: increase brain’s activity
  • Performance enhancers: muscle development
  • Hallucinogens: distort what is seen and heard

Smoking

  • Effects of smoking
  • Long term consequences of smoking
  • Timeline of understanding about smoking and cancer link
  • Carcinogens
  • Statistics associated with cigarette smoking.
  • Carbon monoxide (lack of oxygen, heart disease);Nicotine (addictive)
  • Tars (irritant, carcinogenic)
  • Particulates

Alcohol

  • Effects of alcohol on the body
  • Consequences of drinking alcohol.
  • Drink driving
  • Statistics associated with alcohol

B1F STAYING IN BALANCE

Homeostasis

  • Definition of homeostasis
  • Maintenance of body temperature, water level and blood sugar.
  • Negative feedback
  • Importance of homeostasis
  • What happens when homeostasis goes wrong
  • Vasodilation and vasoconstriction

Insulin and diabetes

  • Causes of diabetes
  • Symptoms of diabetes
  • Hormones vs nerves
  • How insulin works
  • Type 1 and type 2 diabetes
  • Pancreas makes insulin

B1G CONTROLLING PLANT GROWTH

Plant growth and hormones

  • Hormones speed up or slow down plant growth
  • Phototropic and geotropic
  • How Auxin works (HL)

Plant hormones and commercial uses.

  • Selective weedkillers
  • rooting powder
  • fruit ripening (delay or acceleration)
  • control of dormancy

B1H VARIATION AND INHERITANCE

Inheritance

  • Causes of variation
  • Chromosomes, DNA and genes
  • Inheritance vs environment
  • Gametes have half the number of chromosomes of body cells.
  • Red-green colour blind

Genetic disease

  • Cystic fibrosis
  • Inheritance of simple genetic diseases
  • Effects of genetic disease
  • Genetic modification to eliminate disease.

Inheritance and chromosomes Higher only

  • Dominant and recessive alleles
  • Monohybrid crosses
  • Punnet squares
  • Phenotype and genotype.
  • Homozygous- identical allele
  • Heterozygous – different allele
  • Genotype and Phenotype
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