1. Why does a lack of ATP cause muscles to stay relaxed or contracted? 2. How would your range of motion be affected if you lacked a

1. Why does a lack of ATP cause muscles to stay relaxed or contracted?

2. How would your range of motion be affected if you lacked a sternocleidomastoid?

3. Why does cold compressions reduce blood flow to the ankle, but heat would increase blood flow to the ankle in the case of an injury?