Jeff is 13 years old and he has recently noticed some remarkable changes in himself.Over the past few months his voice has started to change,growing deeper.He has begun to grow pubic hair,as well as the beginnings of a facial beard.He is also filling out,with his muscles developing rapidly.These changes in Jeff are probably due to the action of the _____________.
A)pituitary gland
B)thyroid gland
C)pineal gland
D)adrenal gland

Question

Quizplus · Accepted Answer

The pituitary gland is responsible for releasing hormones that stimulate the production of testosterone and other sex hormones. These hormones are responsible for the physical changes that Jeff is experiencing, such as the deepening of his voice, growth of pubic hair, and increase in muscle mass. The thyroid gland, pineal gland, and adrenal gland are not directly responsible for these specific changes.

Jeff Is 13 Years Old and He Has Recently Noticed