Skeletal Muscle Research Paper

Muscles are responsible for all conscious and unconscious movement. It is how we move and react to an environment. There are three types of muscles in the body include the skeletal muscle, smooth muscle, and the cardiac muscle. Whether you are running, walking, breathing, eating, sleeping, or typing it all involves some sort of muscle action. Muscle cells that shape, form, and outline the whole human skeleton is called a muscle fibers. There are two types of muscle fibers: Type I (slow-twitching fibers) and Type II ( fast-twitching fibers). “The slow muscles are more efficient at using oxygen to generate more fuel (known as ATP) for continuous, extended muscle contractions over a long time. They fire more slowly than fast twitch fibers and
Fuel, or calories, is what our body does to metabolize energy. To obtain this fuel, we consume food. Foods we eat made up nutrients and fuel substrates consisting of fat, protein, carbohydrates. Carbohydrates, when broken down, create glucose that is for energy or stored, turns into glycogen, when not in immediate use. Fat is broken down to triglycerides to be used for metabolic energy, and stored as fat when not in immediate use. Protein breaks down into a form of amino acids when used for energy. Carbohydrates and fat are mainly used for all metabolic needs to generate ATP; protein, in a form of amino acids, goes through lipogenesis for cellular energy needs. In event where all fat and carbohydrates are depleted, protein is a last resort for ATP. If you ever noticed on a nutrition label printed on a bag or box of food, sometimes you can see the amount of calories per gram that each substrate has. Carbohydrates and protein stores about four calories per gram, whereas fat contains nine calories per gram; this is one advantage of consuming fat than carbohydrates. Another advantage is fat (triglycerides) can be stored as fat, while carbohydrates require water to form into glycogen for store; this results into water retention (water weight). Disadvantage of fat would be converting into energy (glucose), whereas carbohydrates (glucose) are already broken down and ready to be
One of the most essential parts of the cardiovascular system, the heart pumps the blood throughout the body transporting oxygen and nutrients to cells. The heart is a very complex organ that consists of “four cavities, or open spaces, inside the heart that fill with blood. Two of these cavities are called atria. The other two are called ventricles. The two atria form the curved top of the heart. The ventricles meet at the bottom of the heart to form a pointed base which points toward the left side of your chest. The left ventricle contracts most forcefully, so you can best feel your heart pumping on the left side of your chest.” (Unysis) So, the heart pushes the red, oxygen-rich blood from the lungs through the left side of the heart to the rest of the body. As the blood pumps, it delivers the oxygen and flows back to the heart and through the lungs to drop off carbon dioxide and pick up oxygen. To prevent back flow, heart’s internal structures comprises of valves that open and close with every pump of blood. Another essential part of the cardiovascular is blood. Blood is a fluid containing red blood cells, plasma, antibodies, hormones, enzymes, and nutrients. The purpose of blood consist of transporting oxygen to cells of the body, carry out waste such as carbon dioxide, maintain normal body temperature, and regulate pH levels and hormones. Blood travels through series of vessels. These include