Kaplan Nursing Entrance Exam Practice 2025 – Comprehensive Prep

Testosterone is the primary hormone produced by the testes and plays a crucial role in male development. This hormone is responsible for the development of male primary and secondary sexual characteristics, including the growth of facial hair, increased muscle mass, and deepening of the voice during puberty. It also contributes to libido and overall male reproductive health.

Testosterone's production begins at puberty and continues to be essential throughout a male's life for maintaining various physiological functions, including bone density, fat distribution, and muscle strength. This hormone is primarily produced in the Leydig cells of the testes, highlighting its central role in male biological processes.

The other hormones listed do not play a primary role in male development; rather, they are associated with female reproductive processes or have different functions within the body. Estrogen and progesterone are primarily involved in female reproductive health, while oxytocin is linked to childbirth and social bonding but does not significantly influence male sexual development.