Testosterone Is an Example of a Chemical Signal That Affects

question 55

Multiple Choice

Testosterone is an example of a chemical signal that affects the very cells that synthesize it, the neighboring cells in the testis, along with distant cells outside the gonads. Thus, testosterone is an example of

• A) an autocrine signal.
• B) a paracrine signal.
• C) an endocrine signal.
• D) both an autocrine signal and a paracrine signal.
• E) an autocrine signal, a paracrine signal, and an endocrine signal.

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