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Biology, 14.04.2020 21:56 graymonky12

Testosterone is an example of a chemical signal that affects the cells that synthesize it, the neighboring cells in the testis, along with distant cells outside of the testis. Thus testrosterone is an example of .
I. an autocrine signal
II. a paracrine signal
III. an endocrine signal
A. only I and II
B. only II and III
C. only I and III
D. I, II, and III

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