You are presented with the question "What is required to remove creatinine from the body?" and the following answer choices: 
- evaporation
 - adding heat
 - Dehydration
 - sleep
 - sweating
 - nephrons
 - glucose
 - hydration

Now knowing that nephrons are the structural and functional units of the kidneys and when kidney function is normal, creatinine is removed from the body by the kidneys, choose the best answer.


 

      nephrons   