AQA B1

AQA B1

Fit and Healthy
1. 7 nutrients (CFFWVMP)
2. BMI as a measure of health
  1. mass (kg) / (height m)2
  2. doesn't take into account muscle mass
3. Metabolic Rate
  1. effected by ... gender, genetics, muscle mass, age
Disease & Health
1. Specific defences
2. Vaccination
3. Microbes (growth & Prevention)
  1. Semmelweiss (hand washing)
  2. aseptic techniques
    1. Sterilisation
    2. sterile agar
    3. passing innoculating loop through flame
Nerves
1. Remember the synapse is where chemicals diffuse across the gap between the neurones to make sure the signal carries on
2. rapid response to danger
Homeostasis & the Menstrual Cycle
1. Control of Water, Ions, temp, sugar
2. hormones released by glands ( EG Pituitary or Ovary) and target organs
3. Menstrual Cycle is 28 days - day 14 is when the egg is release
  1. FSH-
  2. Oestrogen
  3. LH
4. control of fertility
  1. IVF
  2. Contraceptive Pill
Plant Hormones
1. Auxins
  1. shoots grow more
  2. root grow less
2. Tropisms
  1. Phototropism (light)
  2. Geotropism (Gravity)
3. used in Rooting powder/weed killer
Drugs
1. types
  1. antibiotics
    1. ONLY KILL BACTERIA
    2. Overuse has led to development of MRSA
  2. painkillers
  3. recreational
    1. Illegal
    2. legal
  4. steroids (performance enhancing
2. drug trials
  1. Blind, double blind trials & placebo
3. Thalidomide
  1. developed for? Used for? Effects?
Interdependence
1. animals compete for light, water, food & mates
2. Adaptations
  1. Features that help survival
    1. Eg ... Increased surface area helps in hot climates as heat is released
3. Feeding relationships
4. Recycling in nature
  1. decay
  2. Carbon Cycle
Variation & Genetics
1. Sexual Reproduction
  1. 2 parents - produces variation!
  2. 23 chromosomes each from the sperm and egg = 23 pairs in offspring
2. Asexal Reproduction
  1. One parent. Produces CLONES!
3. Cloning
  1. In Plants
    1. Cutting
    2. Tissue Transplant
  2. In animals
    1. Embryo Transplant
    2. Adult cell
4. Genetic Engineering
  1. What, why and how? (insulin)
Evolution
1. Lamark
2. Darwin
  1. Natural Selection and survival or the fittest (SEE MRSA EG)

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