You are presented with the question "what are chemical messengers that control many body functions?" and the following answer choices: 
- deltas
 - bioaerosols
 - acetic acid
 - sweating
 - veins
 - human
 - oxygen
 - steroids

Now knowing that hormones are chemical messengers that control many body functions and steroid hormones are the longest acting hormones, choose the best answer.


 

        steroids 