Androgen-binding protein retains testosterone within the seminiferous tubules because the lipid soluble steroid would diffuse easily out of the lumen in its absence.

Question

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Androgen-binding protein is responsible for binding to testosterone and retaining it within the seminiferous tubules because testosterone is lipid-soluble and would diffuse easily out of the lumen in its absence. This allows for proper sperm development and maturation.

Androgen-Binding Protein Retains Testosterone Within the Seminiferous Tubules Because the Lipid