You are presented with the question "What happens when cell walls relax?" and the following answer choices: 
- evaporation
 - permineralization
 - preventing heat transfer
 - allow growth
 - it keeps an organism warm
 - air cools
 - Cell walls expand
 - heat produced

Now knowing that dilation occurs when cell walls relax and blood flow is improved by vitamin E and it causes blood vessels to dilate or expand, choose the best answer.


 

       Cell walls expand  