IUBio

Axon collaterals ?

r norman rsn_ at _comcast.net
Thu Dec 18 11:21:22 EST 2003


On Thu, 18 Dec 2003 12:49:39 GMT, "Glen M. Sizemore"
<gmsizemore2 at yahoo.com> wrote:

>The monoamines have both too, right?

Yes.  Even glutamate has both in the retina.  I misspoke
about "all" the known glutamate receptors.  Glutamate is
"ordinarily" excitatory in the CNS.

Your point is absolutely correct, though.  Whether a synapse is
excitatory or inhibitory depends on the postsynptic channel involved,
not the transmitter. 

>
>"r norman" <rsn_ at _comcast.net> wrote in message
>news:nn83uvkg4c106c5uo04kjv4a6511la6qsr at 4ax.com...
>> On Thu, 18 Dec 2003 10:53:09 GMT, "Glen M. Sizemore"
>> <gmsizemore2 at yahoo.com> wrote:
>>
>> >Isn't "excitatory" vs. "inhibitory" a function of the post-synaptic
>> >receptor?
>>
>> It certainly is for cholinergic synapses.  But somehow all the known
>> glutamate receptors are excitatory and the GABA receptors inhibitory.
>>
>>
>




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