Final answer:
Increasing levels of testosterone inhibit the production of GnRH, LH, and FSH by the hypothalamus and pituitary.
Step-by-step explanation:
The correct answer is option a. Increasing levels of testosterone inhibit the production of GnRH, LH, and FSH by the hypothalamus and pituitary.
Anabolic effects of testosterone in men include increased muscle mass and decreased body fat. However, option a describes a negative feedback mechanism in which increased testosterone levels inhibit the production of hormones that stimulate testosterone production, effectively reducing testosterone production.
Examples of anabolic effects of testosterone in men include increased protein synthesis in muscle cells, leading to muscle growth, and increased red blood cell production, resulting in improved oxygen delivery to muscles during exercise.