<span>Slow twitch muscle fibers. They help enable long endurance, which would be useful for marathon length running.
Skeletal muscle fiber is encircled by a plasma membrane called the sarcolemma, which holds sarcoplasm, the cytoplasm of muscle cells. It gives the cell its striated appearance.</span>
The answer is A. Quit smoking.
Smoking affects the lungs terribly which can greatly affect your heart since they are both part of the cardiovascular system.
EDIT: To further explain, smoking affects your respiratory system (lungs, bronchioles, etc.) however the cardiovascular system depends on the respiratory system. Overall they both keep blood flowing through the arteries of the body. Smoking damages the lining of your arteries, leading to a build up of fatty material which narrows the artery.
Uh what. WAMAI from Rainbow 6
Ask your friend to halo you to get the answers
