Philip is 13 years old. He notices that his penis is getting bigger, and he is growing facial and body hair. He is a little unsettled by these changes and asks his sex education teacher, Mr. Kerchmann, about them. Mr. Kerchmann reminds Philip of the important role that testosterone plays in human development, and tells him all the following EXCEPT that _____.

Please choose the correct answer from the following choices, and then select the submit answer button.


testosterone is responsible for a dramatic increase in muscle mass

boys produce only testosterone and girls produce only estrogen

testosterone is responsible for sexual arousal in both males and females

the concentration of testosterone is about eight times higher in boys after puberty than it is in girls

Boys produce only testosterone and girls produce only estrogen