You are presented with the quiz "What gland makes a chemical in the body to increase the rate of metabolism?" 

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 hormones are made by the thyroid gland". 

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


 

        Thyroid   