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Glycogen synthesis and lysis

  1. Oct 20, 2005 #1
    How are signals form insulin integrated with those from adrealine and contraction to regulate the breakdown or synthesis of glycogen in muscle?

    I know that adrenaline stimulates the conversion of ATP to cyclic AMP by activating adenyl cyclase, and I think insulin does the opposite. But how are the signals combined before having a net effect? It would be easier if they were both hormones. Is adrenaline a hormone? Because it is a neurotransmitter specifically acting on target tissues (though Wikipedia says it's a hormone as well). Is the integration of signals just a simple "summation" of the effects? But that would mean there is no integration...
    Last edited: Oct 20, 2005
  2. jcsd
  3. Oct 21, 2005 #2
    anyone please?
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