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First...my mistake....i am talking strickly in the vertebrate eye. In vertebrates...light does not excite....and in the dark..Glu is released....but not in light I do understand that we see other colors as well, but how? What are these on off cell actually doing? Thank you for those website though, they are still extremely helpful in better understanding the concept of vision in general. Im not sure how to explain my question. The professor also told us not to think so much about the light and color....but more about AP's and EPSP's and synapses and so forth, so that kinda threw me off. Thank you for your help though

I understand how we see black and white. It has to do with the on/off functions on the bi-polar retinal cells. But how do we see gray. This isnt really a homework question, but a thought question that was given to us my our professor. I am assuming it has to do with the fact that the on bipolar is not ALWAYS on and the off and not ALWAYS off, so sometime there will be two off or two on. let me know if im correct or close, or totally off. Any help would be greatly appreciated. Thanks for the help in advance Alex

thank you for your help. I think its talking about how pre can reg pre, etc. For example a GABA can reg GABA instead of Glu and the AP and EPSP will be higher for the Glu1 insteadof having the gaba reg on the Glu. Im gonna try that and see if its right.Thanks again iNow

Well I understand how EPSP's work and I know the different neurotransmitters are such as acetylcholine, but I dont understand what combos I can make. Thanks

Provide three examples of how different neurotransmitter receptors can combine to generate different EPSPs. Where would i find this, and also an example with an experiment of some sort would be nice.. Thanks in advance

thank you very much for your help

What happens when you add more sodium ions (Na+) to an isolated nerve? Do you change the action potential? What happens when you add an abundance of potassium (K+) ions? Any help would be appreciated Thanks in advance A