Cholesterol serves as the precursor for the synthesis of various steroid hormones. Which of the following is the source of $$\text{C}_{19}$$ Steroidal Hormone, Androsterone?

Solution

$$\text{C}_{19}$$ steroids are androgens. Androsterone is an androgen derived from testosterone, which is produced by the Leydig cells of the testes. The corpus luteum makes progesterone, and the adrenal medulla makes catecholamines rather than steroids, so the answer is testes.

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