Answer:
B
Explanation:
When the body is stressed the muscles get tensed up. It's like a reflex
It should be in the grains tell me if im wrong tho
I believe B is the correct answer
Hope this helps
-DunFlowers
Answer:
A normal resting heart rate for adults ranges from 60 to 100 beats per minute.
Explanation:any thing lower is unhealthy
Answer:
A.messages that are sent from the brain to body parts
