Which of the following is a function of testosterone in males as listed?

• A. Deepening of the voice
• B. Regulation of blood sugar
• C. Development of ovaries
• D. Control of appetite

Answer: (A)

Testosterone drives the changes seen in male puberty, especially the deepening of the voice. This happens as the larynx grows and the vocal cords thicken, which lowers the pitch and gives a more mature-sounding voice—a hallmark effect of rising testosterone.

Regulation of blood sugar isn’t a primary role of testosterone; glucose levels are mainly controlled by insulin and other metabolic hormones, not by testosterone. Development of ovaries is a female-specific process, so testosterone doesn’t cause ovaries to develop. Appetite control involves a complex system of signals in the brain with multiple hormones, and while hormones can influence hunger, testosterone isn’t the main regulator of appetite.

Therefore, the deepening of the voice best reflects testosterone’s well-known function in male puberty.