Noradrenaline

... down heart rate by slowing the rate of action potentials that are fired, thus slowing the overall speed of contractions. Likewise norepinephrine/noradrenaline speed up the firing of APs and so speed heart beating. The last bit's just telling you that norepinephrine can also be produced in places ...

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... several weeks, but I've found no sources confirming this. I'm also looking for research papers on the long-term effects of orgasm on serotonin and noradrenaline. I've found plenty of papers on the effects on hormones, but none on the more important monoamines.

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... ventricles there are other factors which contribute to heart rate regulation like direct action of Epinephrine and NorEpinephrine (Adrenaline&NorAdrenaline),also there are physical factors like local warming of SA which lead to increased heart rate,cooling which lead to decreased heart rate,there ...

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... 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 the whey and ...

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... are also based on the different hormones that regulate our body. Not really... It's neurotransmitters mate... Anti-depressants work on serotonin, noradrenaline, dopamine... However, some hormones have roles... i.e. thyroxine and hypothyroidism... but the vast majority do not... (evil pedantic ...

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