What causes a boy's voice to "break" or change at the onset of puberty?
A)Rapid growth of the throat region stretches the vocal cords.
B)Testosterone causes the vocal cords to thicken.
C)Testosterone closes the glottis permanently.
D)Testosterone enlarges the thyroid cartilage (Adam's apple).

Question

Quizplus · Accepted Answer

The correct answer is B because testosterone causes the vocal cords to thicken, which results in a deeper voice. This is also true for girls during puberty, although their voices do not typically undergo as dramatic of a change as boys do.

What Causes a Boy's Voice to "Break" or Change at the Onset