Dopamine

... control, but can be found in other parts of the brain as well, in lower densities. There is evidence that A 2A receptors interact with the dopamine system, which is involved in reward and arousal. (A2A receptors can also be found on arterial walls and blood cell membranes.) Beyond its general ...

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... I'll provide this additional example though. I once took free-form l-phenylalanine (around 500mgs) which is a pre-cursor to neurotransmitters like dopamine, noradrenaline, and adrenaline. I noticed a strong mental excitation effect. Yet, there is almost a gram per serving of l-phenylalanine in ...

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Dopamine has functions in cognition and learning as well as other beneficial traits from an evolutionary point of view. Evolution would have favoured it and the emergence of a receptor for it I would think.

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How did we find out that inside our brain's limbic system there are dopamine receptors? But why are the receptors there? How do you evolutionarily account for it?

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... them to generate specific cell types so they can be used to treat injury or disease. Some examples of potential treatments include replacing the dopamine-producing cells in the brains of Parkinson's patients, developing insulin-producing cells for type I diabetes and repairing damaged heart muscle ...

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