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organisation and quantitative

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  • What is the Ar of Carbon, C
    12
  • What is the enzyme for protein and what is it broken down into
    protease - amino acids
  • What is the purpose of a valve and where are they found
    to prevent backflow - in the veins
  • What tissues make up the stomach
    muscular, glandular and epithelial
  • What are the 3 accessory organs to the digestive system
    liver, gallbladder, pancreas
  • What happens to food we can't break down
    Released as waste (faeces)
  • What are the 4 components of blood and what are their roles
    white blood cells - prevent pathogens, red blood cells - carry oxygen, platelets - clots, plasma - transports substances
  • What is an enzyme
    a protein that acts as a biological catalyst
  • What reagent do we use to test for sugar
    benedict's solution
  • What happens if the temp is too high for an enzyme and at what temp does it happen
    denatures - above 40*C
  • Why can't we absorb a starch molecule into our blood
    its too big or insoluble
  • What do i mean by limiting reagent
    lack of 1 reactant so the reaction stops (is limited)
  • What is the colour change of biuret if protein is present?
    blue - purple
  • What is the hierarchy of organisation
    organelle, cell, tissue, organ, organ system, organism
  • What is something we have to do to benedict solution that we don't have to do to the other reagents
    Put it in a water bath
  • What are the 2 functions of bile
    neutralise stomach acid before entering small intestine, emulsify fats for a large surface area
  • What is avogadros constant? what does it mean?
    6.02x10^23 (number of particles in 1 mole of any substance)
  • What is a catalyst
    Something that speeds up reactions
  • What are all the organs in the digestive system in order?
    mouth, oesophagus, stomach, small intestine, large intestine, rectum, anus
  • What is the Mr of CO2
    44
  • What is the enzyme for starch and what is it broken down into
    amylase - glucose
  • in feet, how long is the average small intestine (+_2ft)
    20 feet
  • What 2 factors effect enzyme activity
    pH and temperature
  • What is the conservation of mass
    mass cannot be created or destroyed only transferred into new products
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