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During puberty, the concentration of testosterone increases inside a male's body and causes changes in multiple organ systems outside of the reproductive system.
The reason this happens is because
when testosterone concentration increases, it diffuses widely through the body and thus strongly affects other organ systems.
testosterone cannot bind to cell surface receptors unless it is metabolized beforehand.
testosterone binds to specific protein receptors on various cells, resulting in similar responses in all affected cells.
testosterone binds to specific protein receptors on various cells, resulting in different responses based on cell type and location.