The 650 skeletal muscles in the human body contract when they receive signals from motor neurons, which are triggered from a part of the cell called the sarcoplasmic reticulum. Motor neurons tell your muscles to contract and the better you become at having those signals tell your muscles to contract, the stronger you can get.
Answer:
The six essential nutrients are vitamins, minerals, protein, fats and oil, water, and carbohydrates.
FUNCTIONS;
cell growth.
blood clotting.
building new cells.
reducing the risk of heart disease and type 2 diabetes.
muscle movement.
balance blood sugar.
brain functioning.
mineral and vitamin absorption.
Explanation:
Brevity is a form of short hand thus would save much time and is needed in the medical field as it needs the use of only few words and would mean short and precise. Hope this answer would be of help.