Fact 1: Insulin is a hormone that helps cells absorb sugar from the blood.

Fact 2: Some tissues such as muscle require insulin to absorb sugar.

Given the two facts above, answer the question "What do muscles rely on for sugar?" with the following options: 
- food
 - insulin
 - Energy.
 - store
 - pancreas
 - exercise
 - lmestone
 - Energy


 

  insulin       