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Nov15-12, 03:41 PM
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Quote Quote by Pythagorean View Post
Neurotransmitters are exchanged via synapses, not ions. And they get taken back up (a process creatively named reuptake). The basis of some pharmaceutical drugs (especially anti-depressants) is that they inhibit reuptake, allowing the neurotransmitter to hang around in the synapse longer to greater effect.

K/Na both leak out of the membrane itself, though, and little protein pumps powered by ATP act to keep up with the leaking. I'm not sure how Na/K leave the brain or body.
Ah ok I see. Now my mental picture of ions for neurons is the following: there are several ions floating around a neuron and they can penetrate via the ions channels of the neuron at particular times, when the channels open up. But how do the ions get to be around the neurons?
Quote Quote by Monique View Post
It's because our common ancestor had already evolved these systems, you might like to read the following publication: Big ideas for small brains: what can psychiatry learn from worms, flies, bees and fish?
ok thank you.