B3.3 Common Systems

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B3.3 Common Systems
2013-05-16 15:54:50
B3 Common Systems

B3.3 Common Systems
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  1. Fossils provide evidence for what theory?
    The theory of evolution.
  2. What is the theory of evolution?
    That life has evolved from simple organisms into more complex over billions of years.
  3. Why is the fossil record incomplete?
    • Plants and animals don't always become fossils.
    • Soft body tissues decay and don't become fossils.
    • Some fossils have not yet been found.
  4. How can you measure growth?
    Size and Mass.
  5. How do animals grow?
    Cell division - mitosis.
  6. How do plant cells grow?
    • They divide by mitosis.
    • Cells can also grow in size - elongation.
  7. What is cell differentiation?
    When a cell changes so it can perform a specific job.
  8. How can percentile charts be used?
    Can be used to check children are growing normally.
  9. Which chamber of the heart pumps blood around the body?
    Left Ventricle.
  10. Which chamber of the heart pumps blood to the lungs?
    Right Ventricle.
  11. What is different about the left ventricle?
    Has a thicker muscular wall to creat high pressure to get blood around the whole body.
  12. What is the function of valves?
    Valves prevent blood flowing backwards.
  13. Which side of the heart conatins oxygenated blood?
    The left side.
  14. Name the 4 major blood vessels.
    • Aorta - biggest artery - carries blood from the heart (left ventricle) to the body
    • Vena Cava - biggest vein - carries blood from the body to the heart (right atrium).
    • Pulmonary Artery - Carries blood from the heart (right ventricle) to the lungs.
    • Pulmonary vein - Carries blood from the lungs to the heart (left atrium).
  15. What is the function of red blood cells?
    Contains haemoglobin to carry oxygen.
  16. What is the role of white blood cells?
    Produce antibodies and antitoxins to kill microorganisms.
  17. What do platelets do?
    Prevent blood from clotting.
  18. What is the name of the fluid component of the blood?
  19. Which type of blood vessels contain valves?
  20. How are arteries adapted for their function?
    Thick muscle walls and elastic tissue to withstand pressure of blood coming away from the heart.
  21. Which type of blood vessel is only one cell thick.
  22. What is peristalsis?
    When muscles in the intestines contract to squeeze food along.
  23. Which enzyme breaks starch down into smaller sugars?
  24. Proteins are broken down by protease enzyme into....
    .. amino acids.
  25. Lipase breaks down fat into.....
    .... fatty acids and glycerol.
  26. Where is protease produced?
    Stomach, Pancreas and small intestine.
  27. Where is lipase produced?
    Pancrease and small intestine.
  28. Where is amylase produced?
    Salivary glands, pancreas and small intestine.
  29. What is the role of bile?
    Emulsifies fat so lipase can digest it easier.
  30. Where is water abosorbed during digestion?
    Large intestine
  31. Where in the body would you find Hydrochloric Acid?
  32. Name the muscular tube that carries food from the mouth to the stomach.
  33. What do probiotics conatin?
    'good' bacteria
  34. What do prebiotics contain
    • Ogliosaccarides.
    • These feed the friendly bacteria already in the gut.
  35. What is a functional food?
    Foods that claim to have health benefits.
  36. What functional food reduce blood cholesterol?
    Plant Stanol Esters.