6. What may happen to your muscles if you are stress? * (2 Points)
It gets bigger
It beats faster
It gets tense and tigntens

it gets tense and tightens

Explanation:

When the body is stressed, muscles tense up. Muscle tension is almost a reflex reaction to stress—the body's way of guarding against injury and pain. With sudden onset stress, the muscles tense up all at once, and then release their tension when the stress passes.

their crystal patterns have been disrupted by stress

reserve is the answer