[Solved] Which of the following is the most common sexual experience during adolescence? A)erotic fantasies B)masturbation C)making out D)sexual intercourse Testosterone Levels: The concentration of testosterone, a critical hormone in the development of male growth and masculine characteristics. Physiological Response: An automatic reaction mediated by the nervous and endocrine systems to a specific stimulus. Human Research Committees: Organizations or groups responsible for reviewing the ethical aspects of research studies involving human participants to ensure their safety and rights. Primitive Brain: Refers to the parts of the brain responsible for basic life functions, such as the brainstem and limbic system.