Answer:
D. all of the above
Explanation:
Sending signals is what computers do like me typing which will send the computer a signal that I am writing this letter. I also, control my breathing and heart rate with my brain, the brain sends nerves through the spinal cord which makes me move and sends them to other parts of the body so they can move too. Therefore, it is just like that.
Answer: principle of self-government is necessary for maintaining good health because it takes a great amount of discipline to stay healthy. It keeps your heart and lungs healthy.
Explanation:
Pulsing I believe is the answer you might be looking for
Answer: False
Explanation: When you go for a run do you feel your heart rate decrease? Of course not
