I'm reading about medicine and specifically opioids. There seems to be a wide variety of forms of these chemicals, I'm curious as to what purpose these serve in these respective plants, and why they function the way they do in mammals.

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    $\begingroup$ Please tell us what you found in your reading. :) $\endgroup$ Commented Apr 11, 2017 at 22:12
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    $\begingroup$ Welcome to Bio and thank you for this interesting questions. I must say this question is too broad imo. A way to narrow it down, for a starters, is split this question up in two separate questions. One on plants, one on brains. Does that make any sense? $\endgroup$
    – AliceD
    Commented Apr 12, 2017 at 5:44


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