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Biology 14 Online
OpenStudy (deysi):

The endocrine system A. is not involved in homeostasis B. relies on the release of chemicals that bind to target cells. C. releases neurotransmitters into the bloodstream for distribution throughout the body. D. is regulated mainly by positive feedback. E. produces effects that last for seconds or minutes.

OpenStudy (shansha1):

thnk its C

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