Which of the following is the function of testosterone

Options

A. It stimulates muscular growth and aggressiveness
B. It influences male sexual behavior (libido)
C. It causes anabolic (Synthetic ) effect on protein/carbohydrate metabolism
D. All of these

Answer

**Step-by-Step Solution:**

1. **Identify the Hormone**: The question asks about the functions of testosterone, which is a male steroid hormone.

2. **Review the Functions of Testosterone**: Testosterone has several known functions in the male body. It is important to analyze each option provided in the question to determine which one accurately describes a function of testosterone.

3. **Evaluate Option 1**: The first option states that testosterone "stimulates muscular growth and aggressiveness." This is true as testosterone is known to promote muscle growth (anabolic effects) and can influence behavior, including aggression.

4. **Evaluate Option 2**: The second option mentions that testosterone "influences male sexual behavior," which is also correct. Testosterone plays a significant role in libido (sexual drive) in males.

5. **Evaluate Option 3**: The third option states that testosterone "causes anabolic effect on protein and carbohydrate metabolism." This is another true statement, as testosterone promotes protein synthesis and affects metabolism.

6. **Evaluate Option 4**: The fourth option is a combination of the previous statements. It summarizes the various functions of testosterone, including its influence on muscle growth, sexual behavior, and metabolic effects.

7. **Select the Correct Answer**: Since all the options describe functions of testosterone, it is crucial to identify the most comprehensive or correct option based on the context of the question. If the question is looking for a singular function, then the option that encompasses the most significant aspects of testosterone's role would be the best choice.

8. **Conclusion**: The correct answer is that testosterone has multiple functions, including stimulating muscular growth, influencing sexual behavior, and having anabolic effects on metabolism.