When you flex your muscles you are contracting them. When your muscle fibers gain tension through Actin and Myosin crossbridge cycling they may shorten due to the tension. This is called muscle contraction
Yes it could lead u to a eating disorder and depression
Answer:
A) Stimulants
Explanation:
I looked it up!
<em>"Methamphetamine is a potent central nervous system stimulant that is mainly used as a recreational drug and less commonly as a second-line treatment for attention deficit hyperactivity disorder and obesity."</em>
Hope this helped, and good luck on your assignment!