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 option D. I, II, and III.
Testosterone is a vital paracrine regulator of intratesticular capabilities further to a hormonal regulator of a spread of greater testicular cells. similarly to stimulating steroidogenesis, LH controls the provision of its non-public receptors and governs the increase and differentiation of Leydig cells.
Testosterone is the primary sex hormone and anabolic steroid in adult men. In humans, testosterone performs a key function inside the improvement of male reproductive tissues which includes the testes and prostate, further to selling secondary sexual traits including elevated muscle and bone mass, and the increase of hair.
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