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2007-03-27 05:43:08 · 2 answers · asked by sissybombay 3 in Social Science Psychology

2 answers

Endogenous substances are those that originate from within an organism, tissue or cell

2007-03-27 05:46:53 · answer #1 · answered by Molly323 5 · 0 0

Like a local drug....

2007-03-27 12:46:38 · answer #2 · answered by C12H22O11 4 · 0 1

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