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    The reaction centre is in the thyklaoid membrane ^
    The ECT is in the stroma.

    Might be asked about the ph of these two areas and explain why they are different.
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    (Original post by Remarqable M)
    CHUCK THANK YOU SOO MUCH! now i don't have to worry about osmoregulation.
    no problemo
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    Omg thanks ibysaiyan
    i was struggling to get my head around that
    the revision guide wasnt too clear :/

    next question
    can you put NADH2 instead of reduced NAD in respiration
    or will i lose marks ?
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    (Original post by chuck111)
    Heres the stuff on osmoregulation

    Osmoregulation

    • Water potential of the blood monitored by osmoreceptors in the hypothalamus
    • When osmoreceptors stimulated by low water potential in the blood, hypothalamus sends nerve impulses to the posterior pituitary gland to release ADH.
    • ADH makes the walls of the Distal convoluted tubule and collecting duct more permeable to water

    Osmoregulation when blood water potential drops

    • Water potential drops
    • Detected by osmoreceptors in the hypothalamus
    • Posterior pituitary gland is stimulated to release more ADH into blood
    • More ADH means that the distal convoluted tubule and collecting duct are more permeable to water
    • More water reabsorbed into the blood by osmosis
    • Small amount of concentrated urine produced
    So much easier when you read it like this!! thanks a million
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    Name two other nitrogenous waste products found in urine except urea...wtf. :confused:

    Can't be ammonia, that's converted. Can't be amino acids since proteins are too big. What is it.
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    (Original post by Tinkerbelle ♥)
    Thanks Just to clear it up in my head..

    So you could say how the sodium channels open allowing sodium in - this is increased then by (when the threshold is reached) voltage-gated sodium ion channels opening allowing even more to enter.. blaa blaa and same for K+
    Ye you could say that
    x
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    (Original post by InvoluntarySlacker)
    Name two other nitrogenous waste products found in urine except urea...wtf. :confused:

    Can't be ammonia, that's converted. Can't be amino acids since proteins are too big. What is it.
    Nucleotides is one.
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    (Original post by InvoluntarySlacker)
    Name two other nitrogenous waste products found in urine except urea...wtf. :confused:

    Can't be ammonia, that's converted. Can't be amino acids since proteins are too big. What is it.
    Is uric acid one?
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    (Original post by Chris999x)
    Omg thanks ibysaiyan
    i was struggling to get my head around that
    the revision guide wasnt too clear :/

    next question
    can you put NADH2 instead of reduced NAD in respiration
    or will i lose marks ?
    I say use . red NAD that would suffice or NADH
    beacuse if you write down NADh2 ermm that means the co-enzyme takes 2 hydrogen atoms ...
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    They both could be but I'm realising that this will not be in the specification and I don't need to learn it. :emo:
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    (Original post by Nana786)
    Is uric acid one?
    Excessive nucleotides are broken down into uric acid, other hmm ammonia, uric acid and urea ;p
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    (Original post by ibysaiyan)
    I say use . red NAD that would suffice or NADH
    beacuse if you write down NADh2 ermm that means the co-enzyme takes 2 hydrogen atoms ...
    I thought the coenzyme did take 2 hydrogen
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    Scary as ****.
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    (Original post by InvoluntarySlacker)
    They both could be but I'm realising that this will not be in the specification and I don't need to learn it. :emo:
    yea we don't =) but we do need to know that Ornithine cycle uses atp
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    (Original post by Chris999x)
    I thought the coenzyme did take 2 hydrogen
    Oh yea it does...
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    (Original post by InvoluntarySlacker)


    Scary as ****.
    LOL Pawned
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    (Original post by ibysaiyan)
    yea we don't =) but we do need to know that Ornithine cycle uses atp
    Yeah I know that. Needs ATP to create Urea and to release* it.
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    (Original post by ibysaiyan)
    Oh yea it does...
    thanks mate
    im probs best just keepin simple and stickin to using the word reduced
    just to be sure
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    (Original post by InvoluntarySlacker)
    Name two other nitrogenous waste products found in urine except urea...wtf. :confused:

    Can't be ammonia, that's converted. Can't be amino acids since proteins are too big. What is it.
    nucleotides and ammonium? maybe hormones
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    (Original post by BHAM!)
    nucleotides and ammonium? maybe hormones
    Don't know. Don't care no longer, this kidney paper is just far too big and far too detailed.



    It's going well though. Got Excretion, Nerves, Photosynthesis, Hormones covered. Now need to do Respiration tomorrow morning and recap this shiz with the specimen paper I got off here. :emo:
 
 
 
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