You are presented with the quiz "Which gland has the largest impact on human 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 "tSH, which is secreted by the pituitary gland, stimulates the thyroid gland to produce hormones". 

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


 

  Pituitary         