What Is Skeletal Muscles?

The anatomy and physiology of the human body explains that muscles are attached to the skeleton. They work like hinges or levers to pull or move particular joints when a muscle contracts, pulling the joint in the direction it is designed to move. Parts of muscles move antagonistically, that is, when one contracts, its opposite member relaxes to allow movement. Muscles can become slack, making movement slower and more difficult.

The human body contains three kinds of muscle tissue: cardiac muscle, smooth muscle and skeletal muscle; each performs specific tasks to maintain homeostasis – the tendency to maintain a stable equilibrium between interdependent elements, mainly that which is maintained by physiological processes. The primary function of muscle, regardless of kind, is to convert chemical energy to mechanical work, which in turn allows the muscle to shorten or contracts. The muscle tissues observed in this experiment is the skeletal muscle which are usually attached to the skeleton. As a result, contraction of the skeletal muscle moves one part of the body with respect to another.

Introduction: According to the “Human Physiology Laboratory Manual “,BIOL 282 ,page 31 , the reason of performing this experiment is to learn how the muscle contraction occurs based on the molecular level and what kind of factors are involved .As a matter of fact, skeletal muscles contain a lot of nuclei because of the cell fusion while being developed and are made of cylindrical cells that have myofibrils. The myofibrils contain sarcomeres and the

Martini, F. H., Nath, J. L., and Bartholomew, E. F. “Muscle Tissue.” Anatomy & Physiology. 9th

These fibers are known as "white fibers" because they do not contain much blood. The major difference between a and b is type IIa uses oxidative glycolytic which uses oxygen to help convert glycogen to ATP. Type IIb fast glycolytic, which rely on ATP stored in the muscle cell to generate energy. These fast-twitch muscle fibers have a much high activation threshold than slow-twitch. These muscles are activated when slow-twitch are unable to sustain the force needed for the body. The major down fall of type IIa and type IIb is the ability to fatigue quickly. The fast-twitch muscle group is responsible for the growth and shape of particular muscles within the body. Fast-twitch fibers are better suited for weight lifting and sports such as football. Most bodily muscles are evenly made of slow-twitch and fast-twitch

O B J E C T I V E S 1. To define these terms used in describing muscle physiology: multiple motor unit summation, maximal stimulus, treppe, wave summation, and tetanus. 2. To identify two ways that the mode of stimulation can affect muscle force production. 3. To plot a graph relating stimulus strength and twitch force to illustrate graded muscle response. 4. To explain how slow, smooth, sustained contraction is possible in a skeletal muscle. 5. To graphically understand the relationships between passive, active, and total forces. 6. To identify the conditions under which muscle contraction is isometric or isotonic. 7. To describe in terms of length and force the

Of all the tissues in the body, skeletal muscle can adapt the easiest. —- On the outside of the muscle just deep to the sarcolemma, are small cells that lack cytoplasm and help with the reparation of muscles, called satellite cells. During an intense workout, the fibers within the muscle tissue become damaged as they break down and tear. The job of

Our body has three muscle types, skeletal muscle , cardiac muscle, and smooth muscle. Each muscle has different functions within the body. Cardiac muscle is located in the heart and is responsible for pumping blood within the heart. Cardiac muscle is one of the two muscles with an activity that is non-voluntary meaning that signal from the motor neuron is not required for blood to pump through the heart. The second type of muscle is smooth muscle which is located in the intestines and responsible for moving food and regulating blood pressure(Freeman, 2011). Like cardiac muscle, smooth muscle also requires non-voluntary activity, where the signal from the motor neurons is not required for it to function properly. Lastly, the most important muscle in the neuromuscular junction, skeletal muscles. Skeletal muscle is attached to the bones through tendons composed of connective tissue and is responsible for moving the skeleton, however unlike the other two muscle types, skeletal muscle requires voluntary activity meaning that signal from the motor neurons is required (Ritchison, 2016). In this paper, I will be discussing the functions and parts of the neuromuscular

The musculoskeletal allows the body to function through a group of muscles, bones, tendons, cartilage and ligaments. The body moves through different muscle contractions. This makes the bone pull towards the contracting muscles. The skeletal system provides a structure for the body, while the muscular system creates movement in the bones of the skeletal system by contracting and relaxing. When exercising, the muscles increase in pliability. This is when the muscles become more pliable as they become warm, reducing the chance of getting an injury. They become more pliable as the muscles contract really fast when exercising. The contractions generate heat take makes the muscle more pliable.

In Anatomy and Physiology, one of the topics this class recently covered was the muscle system. In the video, “How Your Muscular System Works” published in 2017 by Emma Bryce said a brief explanation of how the muscular system works. In the video, Bryce stated, “Each time you take a step, two hundred muscles work in unison to lift your foot, propel it forward, and set it down.” Indeed, each muscle is responsible to do a specific movement. The muscle system is a very important system because this is where the three types of muscles come from. For example, in the video, it talked about the skeletal muscle, cardiac muscle, and the smooth muscle. The skeletal muscle is involuntary muscle and voluntary muscles. In addition, the cardiac muscle and the smooth muscle are only involuntary muscles. The cardiac muscle is only found in the heart. The smooth

The musculoskeletal involves the muscles and skeletal system which consist of bones supporting the bodyweight. The muscles and bones help in movement and maintaining body position through the physiological process of contraction and relaxation, muscles pulling on the bones. The skeletal systems also consist of cartilages and ligaments important for bone connection and stability with connective tissue. The muscles get attached to the bone by the connective tissue enhancing contraction and relaxation in movement. The muscles contain long muscle fibers responsible for the contraction and relaxation. The fibers contain bundles some of which allow slow movement described as slow twitch and fast twitch which ensure fast movement. The process of movement involves coordination between the musculoskeletal system and nervous system. In the process of muscle contraction to enhance movement the following takes place. (Arthur Guyton, 2006)

Muscles use energy that they get from food. The function of the muscular system is movement. It helps everything move. Some muscles are connected to bones by tendons so that it creates a system that works so the human body can move. Muscles control every move you make, including the movement inside the body.

Muscles execute a multitude of involuntary and voluntary functions throughout the entire body. They are a huge part of what get the body going, and keep it going too. These contracting fibers are comprised of about 75% water, 20% protein, and the other 5% is a mix of carbohydrates, lipids, and salts.

There are several different ways to measure the overall activity of skeletal muscles; one way deals with the electrical activity. During a contraction of skeletal muscles a significant amount of

Many different types of vertebrates, whether it be animal or human, contain three distinct types of muscles: cardiac, smooth and skeletal muscle, that can be assessed and differentiated by their function and morphology. Cardiac muscle, also deemed heart muscle, is an involuntary and striated type muscle that is responsible for the pumping of blood throughout the body. This process confirms that tissues get enough oxygen that help them to regulate homeostasis in the body. Smooth muscle is found in many organs such as blood vessels and its primary function is to assist in the movement of materials in and out of the body. Skeletal muscle is a voluntary type of muscle, meaning you can consciously control what you do (Rayment et