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    what could the potential essay??

    any feelings??

    i think enzymes?? my teacher says lipids??

    what yall think?

    and ne good sites that have model essays??? to help us write the essays?
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    I'm dreading the synoptic exam, havent actually revised for it yet! For the essay im going to go through all the topics we have every done and see which topics comes up most frquently and revise them the most. Also im going to try and link as many topics together. Its bound to be about enzymes, energy, cycles in bio or transport
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    I heard that enzymes came up in january, but not 100% tho. i dont know any sites with model essays (I wish!!) but www.biologymad.com has a massive list of possible essay titles, some of them are less human biology ish tho, so i just pick and chose the best ones for my course!!

    Maybe we could all come up with some ideas and plan them 2gether on this thread?
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    Here is one plan of mine, just wana see what anyone else thinks about the question and whether Ive missed anything out :p:

    Maintaining a constant internal environment

    Intro: define homeostasis, its importance in making sure enzymes aren’t denatured, water potential stays constant, temperature is at optimum etc. idea of NEGATIVE FEEDBACK

    Main:

    Plasma membrane controls the rate of movement of molecules through the membrane.
    Water potential needs to be constant because otherwise cells would burst or shrink.
    Enzymes need optimum environment - right temperature (diffusion/denatured), correct pH(can affect ionic bonds or charges on amino acids within active site).
    Constant supply of oxygen by adaptations of lungs - thin exchange surface, large SA (alveoli), diff. in conc. (breathing)
    Water potential in capillaries ? with lack of plasma proteins, tissue fluid not reabsorbed.
    Barriers to prevent micro-organism entry ? makes sure internal environment not affected
    Constant supply of energy - respiration ?
    Buffer solution (e.g. haemoglobin) to control pH of blood by absorbing/releasing H+ ions.
    Autonomic nervous system to ensure internal factors are controlled.
    Blood glucose control via alpha and beta cells
    1) insulin lowers glucose concentration
    2) Glucagon converts more glycogen to glucose
    Role of behaviour via voluntary centre to control core temperature.
    Heat loss/heat gain centre to keep temp constant.
    Describe responses to cold/warm temp.
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    anyone have any more ideas for synoptic essay titles please?
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    hi ya, ive just planned a few essays could anyone tell me if ive missed anything blatantly obvious out?!
    Also wot do you think the likely synoptic essay titles will be? Im hopin its enzymes but i think that may have come up in january :rolleyes:

    Thanks people
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    (Original post by poptart86)
    hi ya, ive just planned a few essays could anyone tell me if ive missed anything blatantly obvious out?!
    Also wot do you think the likely synoptic essay titles will be? Im hopin its enzymes but i think that may have come up in january :rolleyes:

    Thanks people
    i think this maybe very indirect but wat about protozoa and bacteria in ruminants. the microorganisms are digested by the cow and the protein the bacteria contain are broken down to amino acids for ruminant to use. u could say that amino acids used by ruminants for growth and reapir of cells and tissue which humans consume as meat. also the microorganism can convert non nitrogen proptein into protein which the cow gains later wen the microorganism is digested.
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    (Original post by ky1986)
    i think this maybe very indirect but wat about protozoa and bacteria in ruminants. the microorganisms are digested by the cow and the protein the bacteria contain are broken down to amino acids for ruminant to use. u could say that amino acids used by ruminants for growth and reapir of cells and tissue which humans consume as meat. also the microorganism can convert non nitrogen proptein into protein which the cow gains later wen the microorganism is digested.
    do you know what i might just learn that. if I add it in an essay it might make me seem really clever, esp. if its not directly on the spec :p:
    thank you
 
 
 
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