Q: Which type of cells in the human body are responsible for the synthesis and secretion of testicular hormones?  

Answer: D

In the male human body, Leydig cells are responsible for the synthesis and secretion of testicular hormones (androgens). The male reproductive system includes a pair of testes, accessory ducts, glands, and upper genitals. Each testis contains around 250 compartments, known as testicular lobules, each containing one to three highly coiled seminiferous tubules where spermatozoa are produced. These tubules are lined with two types of cells, male germ cells (spermatogonia) and Sertoli cells. Leydig cells are situated outside the seminiferous tubules and produce testosterone, which regulates the growth and maintenance of male reproductive tissues, including the testes and prostate gland.

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