You are presented with the question "What increases the rate of metabolism in cells throughout the body?" and the following answer choices: 
- Thyroxine
 - Smoking
 - fever
 - bioaerosols
 - acetic acid
 - sweating
 - Power plants
 - heat produced

Now knowing that thyroid hormones increase the rate of metabolism in cells throughout the body and thyroxine, a thyroid hormone, is an aryl iodide, choose the best answer.


 

 Thyroxine        