Fact 1: Thyroid hormones increase the rate of metabolism in cells throughout the body.

Fact 2: Thyroxine, a thyroid hormone, is an aryl iodide.

Given the two facts above, answer the question "Thyroxine increases the rate of metabolism in cells throughout the what?" with the following options: 
- Summer
 - body
 - state
 - skin
 - H 2 O
 - HIV
 - life
 - humans


 

  body       