You are presented with the question "what happens to fibers after muscle activation?" and the following answer choices: 
- It expands
 - Localized damage
 - It decreases
 - get shorter
 - they bend
 - rapid expansion
 - sweating
 - movement

Now knowing that muscle contraction occurs when muscle fibers get shorter and muscle activation is a prerequisite for muscle contraction, choose the best answer.


 

    get shorter     