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    (Original post by Tinkerbelle ♥)
    I'm actually really diasppointed. I revised really hard for this exam and loads of it just wasn't needed. And it's not as if I'm stupid either yet I'm going to come out with a **** grade
    I'm in the exact same boat. :console:
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    anything to do with the fats being a respiratory substrate for mr.seal?
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    (Original post by 94_confessions)
    Acetylcholinesterase at the synapse? .
    :eek: yes! Why not :P hehehe
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    (Original post by InvoluntarySlacker)
    We're getting an arranged marriage.


    Didn't you get the memo?


    I dislike icing as it is too sweet and makes me feel sick when consumed in large quantities. I dislike honey as it causes the same effect as icing.

    I don't think we shouldn't get married

    We're far too different.

    Spoiler:
    Show
    double negative
    Heyyyyy! that's a sneaky double negative! :yep:
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    (Original post by Remarqable M)
    you knwo the synapse question did dyou guys write at the end of the line that pre-synaptic vesicles fuse with pre-synaptic membrane and acetycholine
    leaves the pre-synaptic membrane by exocytosis ??
    yes sir and add to that ATP is used.
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    (Original post by Remarqable M)
    you knwo the synapse question did dyou guys write at the end of the line that pre-synaptic vesicles fuse with pre-synaptic membrane and acetycholine
    leaves the pre-synaptic membrane by exocytosis ??

    AP through the synaptic knob, open calcium channels, activates acetyl choline vesicles, which bind to CSM, and enter the cleft by exocytosis yes !
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    (Original post by Remarqable M)
    you knwo the synapse question did dyou guys write at the end of the line that pre-synaptic vesicles fuse with pre-synaptic membrane and acetycholine
    leaves the pre-synaptic membrane by exocytosis ??
    Yes. This was the simplest question and I loved it because it was 4 marks.
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    (Original post by ibysaiyan)
    LOl...
    and on the question on whether Ach is secreted ermm NOPE a thing is said to be secreted only when its being produced into that cell and released within the same capillaries by exo or ecto.
    End
    It is produced in that cell! The Acetylcholine gets broken down in the synaptic cleft into ethanoic acid and choline, which get recycled back into the presynaptic membrane and combined together again to form acetylcholine. It then enters a vesicle and gets secreted into the synaptic cleft, how can that not be defined as secretion?!?
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    (Original post by ibysaiyan)
    i dont know about that , which book? one from OCR clearly shows and states a stunt.
    OCR A2 biology text book......
    really not sure?!?!.....
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    (Original post by Get Cape.Wear Cape.Fly.)
    Heyyyyy! that's a sneaky double negative! :yep:
    Biology's in the air..
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    (Original post by DR_X)
    OCR A2 biology text book......
    really not sure?!?!.....
    ermm yes i am sure. OCR BY MAMA JONES.
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    (Original post by Get Cape.Wear Cape.Fly.)
    Heyyyyy! that's a sneaky double negative! :yep:
    So what about it. :perv:

    I'll legally change my name to Tyson Beckford so you can proudly tell the ladies at the hairdressers you're married to Tyson Beckford.
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    (Original post by DR_X)
    I just checked. In the book it says, In haemodialysis blood from a vein is passed in to a machine.........?!!!


    I put vein then artery but no idea, if it's right or wrong......
    I thought the point was that the kidney is supplied by the renal artery and is drained by the renal vein and the dialysis machine is basically replacing the kidney so...
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    Please OCR, please please lower the grade boundaries.
    Is there any way any of us can complain, this felt so unfair!

    http://www.facebook.com/#/group.php?...8444664&ref=mf - my mate made a group LOL
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    (Original post by buyingtheticket)
    I thought it diffused across the cleft...:confused:
    this is what i mean lol people confuse between diffusion and secretion.
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    (Original post by maniacsandwichbar)
    It is produced in that cell! The Acetylcholine gets broken down in the synaptic cleft into ethanoic acid and choline, which get recycled back into the presynaptic membrane and combined together again to form acetylcholine. It then enters a vesicle and gets secreted into the synaptic cleft, how can that not be defined as secretion?!?

    The Acetyl Choline binds to receptors on the sodium channels on the post synaptic membrane, and is broken down by acetyl choline esterase
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    (Original post by Good Apollo)
    Hahahaha! That is so going in my sig :cool:
    haha thanks
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    (Original post by buyingtheticket)
    I thought it diffused across the cleft...:confused:
    It does, after it has been secreted out of the presynaptic membrane, it then diffuses across the synaptic cleft and binds to the receptors on the postsynaptic membrane.
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    (Original post by InvoluntarySlacker)
    I'm in the exact same boat. :console:
    Oh well, come June at least we'll have each on this thread revising for it all over again..lol :sigh:
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    (Original post by Kulpio)
    The Acetyl Choline binds to receptors on the sodium channels on the post synaptic membrane, and is broken down by acetyl choline esterase
    Yes, and then what I said happens.
 
 
 
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