Final answer:
Testosterone is responsible for developing accessory sex organs, aiding spermatogenesis, and controlling sex drive. It contributes to the appearance of secondary sexual characteristics and the proper functioning of male reproductive organs. The correct option is (D)
Step-by-step explanation:
Testosterone is a hormone responsible for numerous functions related to sexual development and reproduction in males. Specifically, it develops accessory sex organs, aids in spermatogenesis, and controls sex drive. During puberty, testosterone leads to the development of secondary sexual characteristics such as a deepening voice, and the growth of facial, axillary, and pubic hair. It also plays a key role in increasing muscle bulk. For mature males, testosterone is crucial for maintaining normal spermatogenesis in the testes. Together with follicle-stimulating hormone (FSH), it helps Sertoli cells in the testes concentrate testosterone to high enough levels to maintain sperm production. Testosterone is additionally involved in the proper functioning of the prostate gland and aids in erection during sexual arousal. Therefore, the correct answer to the question 'Testosterone does which of the following?' is D. All of the above.