QUESTION 3 Testosterone can affect the cells that synthesize it in the testis, neighboring cells, and cells that are distant and outside of the gonads. This means that testosterone is an example of: a neurohormone signal, a neuroendocrine signal, and an exocrine product a paracrine signal, a synaptic signal, and an exocrine product an autocrine signal, a neuroendocrine signal, and a synaptic signal an autocrine signal, a paracrine signal, and an endocrine signal

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Cell Signaling

It allows cells to perform various cellular activities, coordinate, and interact with other cells. All cells of an organism receive signals from their environments and respond accordingly. Even the unicellular eukaryotes receive signals secreted by other cells and respond. In the case of yeast, mating takes place by signaling between the yeast cells. Communication by cell signaling in a multicellular organism has become a vast and important part of various fields of biology.