BIOLOGY

BIOLOGY

HUMAN HEALTH&DIET
1. THERE ARE SEVEN DIFFERENT FOOD GROUPS
  1. PROTEINS
  2. CARBOHIDRATES
  3. VITAMINS
    1. Vitamin D
      1. Good dietary sources of vitamin D include: eggs margarine and breakfast cereals fortified with vitamin D oily fish
    2. Vitamin C
      1. Good sources of vitamin C include: citrus fruits (such as oranges, lemons and limes) leafy green vegetables (such as sprouts and broccoli)
    3. Vitamin A
      1. Good sources of vitamin A include: milk, and dairy products (such as cheese and yoghurt) mackerel and other oily fish
  4. WATER
  5. MINERALS
    1. IRON
      1. Good sources of iron include: liver red meat beans and nuts dried fruits such as dried apricots
    2. CALCIUM
      1. Good sources of calcium include: cheese eggs milk green leafy vegetables such as broccoli and cabbage
  6. FIBRE
    1. Fibre is an important component of a healthy balanced diet. We get fibre from plant-based foods, but it's not something the body can absorb.
  7. FAT
    1. Sources of water include: food drinks metabolic processes - such as aerobic respiration Dietary fibre
EXERCISE
1. your pulse increases when you exercise because your heart has to pump more blood around your body
2. BLOOD PRESSURE
  1. diastolic is the lowest pressure that the arteries are under during a heart beat cycle
  2. systolic is the highest pressure the arteries are under during a heart beat cycle
DRUG TRIALS
1. THERE ARE TWO TYPES OF DRUGS TRIAL
  1. BLIND TRIALS
    1. blind trials – the volunteers do not know which group they are in but the researchers do
  2. DOUBLE BLIND TRIALS
    1. double-blind trials – neither the volunteers nor the researchers know which group the volunteers are in until the end of the trial

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