science

• whats is a gas exchange?


  the transfer of gasses between an organism and its enviroment
• ribs move


  inhaling- up+out exhaling-down + in
• diaphragm moves

  inhaling-down exhaling-up
• chest volume


  inhaling-increases exhaling-decreases
• what is a drug?


  a substance or chemical which causes a change in the way your body works
• what are some causes if u smoke whilst pregnant? (5)


  still born

  miscarrige

  premature baby

  damage to the babys brain

  low birth weight
• short term effects on tar

  smelly hands

  black consistency in lungs
• short term effects on nicotene

  stimulant

  relaxes body
• short term effects for carbon monoxide

  agited

  shortness of breath
• heart disease

  arteries become blocked, prevents blood from flowing properly, may cause heart attack/stroke
• throat/lung cancer

  chemicals damage dna
• emphysema

  chemicals in tobbbaco smoke damage alveoli in lungs
• respiratory infections-

  chemicals in tobacco amoke damage the cilia in the windpipe causes mucus to flow into the lungs
• name 7 nutrients


  fibre

  carbs

  minerals

  fats

  protein

  water

  vitamins
• what is our main source of energy

  carbohydrates
• what solution and what colour does it turn to test for starch-

  iodene

  dark blue/black
• what solution and what colour would it turn for protein-

  biuret

  purple/dark blue
• what solutions and what colour would it turn for sugar-

  benedicts solution

  red/ brown

  light green if a small amount
• what solution and what colour would it turn for fat-

  water in boiling tube

  if it turns cloudy fat is present
• 6 examples of illnesses or diseas caused by unhealthy diet


  diabetes

  scurvy

  obesity

  night blindness

  heart diseases

  rickets
• what hydrates the body

  water
• what heals the body

  protein
• whats the process when oxygen is transferred into the blood stream called

  diffusion
• what are enzymes

  large proteins and work as catalysts they also speed up reactions without being used
• what is protein broken down by and what does it turn into

  protese. Amino acids.
• what is starch broken down by and what does it turn into?

  carbohydrase, glucose.
• what are lipids broken down by and what does it turn into?

  lipase . Fatty acids and glycerol.
• in a cigarrete what sticks to your lungs

  carbon monoxide
• what does a stimulat do

  speed up nervous system
• what does a deppressant do

  slows down nervous system