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.
>>>>>