You are presented with the question "What increases metabolism in cells throughout the body?" and the following answer choices: 
- lymph nodes
 - aerobic capacity
 - puberty
 - thyroid gland
 - Smoking
 - smoking cigarettes
 - cells
 - heat energy

Now knowing that thyroid hormones increase the rate of metabolism in cells throughout the body and thyroid hormone is made by the thyroid gland, choose the best answer.


 

    thyroid gland     