You are presented with the quiz "what in the neck is responsible for an increase in the rate of metabolism in cells" 

But you don't know the answer, so you turn to your teacher to ask for hints. He says that "thyroid hormones increase the rate of metabolism in cells throughout the body" and "thyroid hormone is made by the thyroid gland in the neck". 

So, what's the best answer to the question?


 

  thyroid gland         