Fact 1: Hormones are chemical messengers that control many body functions.

Fact 2: Many hormones are proteins .

Given the two facts above, answer the question "What are many chemical messengers that control body functions?" with the following options: 
- gasses
 - photons
 - acetic acid
 - flames
 - heat or cold
 - chemical waste
 - proteins
 - sweating


 

       proteins  