What is the role of testosterone in males?

• A. It is responsible for fat metabolism
• B. It promotes secondary sexual characteristics
• C. It inhibits muscle development
• D. It regulates blood pressure

Answer: (B)

Testosterone plays a crucial role in promoting secondary sexual characteristics in males, which include the development of features such as facial and body hair, deepening of the voice, and increased muscle mass. These changes begin at puberty and are essential for the overall development of male phenotype. Additionally, testosterone influences libido and plays a role in spermatogenesis, which is vital for male fertility.

While testosterone may have secondary effects on fat metabolism and muscle development, its primary function during puberty and throughout adulthood focuses on establishing and maintaining male secondary sexual characteristics. The assertion that testosterone inhibits muscle development is inaccurate, as one of its significant effects is to enhance muscle growth and strength. As for blood pressure regulation, though hormones can influence vascular function to some extent, testosterone is not primarily recognized for this role.