You are presented with the question "What helps cells take up glucose from the blood?" and the following answer choices: 
- Chemical energy
 - Veins and arteries.
 - layers of fat
 - sweating
 - protein hormones
 - aqueous solution
 - oxidation reaction
 - pancreas

Now knowing that insulin helps cells take up glucose from the blood and for example, insulin is a protein hormone, choose the best answer.


 

     protein hormones    