Testosterone Is an Example of a Chemical Signal That Affects

Multiple Choice

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

A) a neurohormone signal, a neuroendocrine signal, and an exocrine product
B) a paracrine signal, a synaptic signal, and an exocrine product
C) an autocrine signal, a neuroendocrine signal, and a synaptic signal
D) an autocrine signal, a paracrine signal, and an endocrine signal