<span>They are used because they keep reproducing more of themselves for use when most cells wouldn't !!!!!!!!!!!!</span>
The list which correctly summarizes the main functions of proteins in the human body is the last one - p<span>owering movement, structural support, hormone production, antibody and enzyme production.
Skeletal muscles are responsible for movement and those muscles are made of protein. </span>
Athletes tend to have lower resting heart rates<span> because training programs that build speed, fitness, muscle and endurance also train your heart muscles to pump a </span>higher<span> volume of blood with each heartbeat.</span>
Through the process of photosynthesis, carbon dioxide is pulled from the air to produce food made from carbon for plant growth.
