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What is Testosterone secreted by, and explain in detail?
Ans:A. Leydig's cells.The hypothalamus sends a signal to pituitary gland to release gonadotrophic substances (follicle stimulating hormone and luteinizing hormone).Luteinizing hormone (LH) stimulates testosterone production.Testosterone is produced by gonads (by Leydig cells in testes in men & by ovaries in women).