Essay on Muscle and Cross Section Cells

An increase in the strength of a muscle’s contraction is necessary to perform a task. Subsequently, the brain increases the number of simultaneously active motor units within the muscle by a process known as the motor unit recruitment. Physical muscle movement in humans involves movement of fibers which are hundreds of cylindrically shaped cells bound together by connective tissue. It is essential for individuals, mainly professionals who work to promote health, to understand the mechanisms in the body. Resting skeletal muscles in vivo exhibit a phenomenon known as tonus, a constant state of slight tension that serves to maintain the muscle by motor centers in the brain and spinal cord. However, muscle

Serves as the cell 's skeleton. It is an interior protein system that gives the cytoplasm quality and adaptability. The cytoskeleton of all cells is made of microfilaments, halfway fibers, and microtubules. Muscle cells contain these cytoskeletal parts in addition to thick fibers. The fibers and microtubules of the cytoskeleton frame a dynamic system whose ceaseless rearrangement influences cell shape and capacity.

These muscle tissue cells specialised to contract and move parts of the body. It is also capable of responding to stimuli. There are three types of muscle in the body such as: skeletal, cardiac and smooth. Each muscle is created of muscle fibers that are capable of contracting and returning back to original state-relaxation. Contraction causes movement of the skeleton, soft tissue, blood or specific material. Skeletal muscle is attached to the bones of the skeleton. Some facial muscles are attached to the skin. They have direct control over them through nervous impulses from our brain sending messages to the muscle. Contractions can vary to produce fast, powerful movements. These muscles also have the ability to stretch and contract to return to original shape. Cardiac muscles are found in the chambers of the heart such as the atria and ventricles. It is under the control of the automatic nervous system; however, even without nervous input contractions can occur. It is completely different to all the other muscles. Smooth muscles are also known as involuntary due to our inability to control its movement. This muscle is usually found in the walls of hollow organs

Epithelium – Epithelium tissues are composed of layers of the cells that are closely packed together which is specialised to form the covering or lining of both external and internal surface of body such as surface of your skin and internal digestive system. The main function of epithelium tissues are to provide protection like skin that protects you from injury, secretion like glands such as enzymes, and to absorb materials like intestine such as waste products etc.

There are three types of muscle tissue: skeletal, cardiac and smooth muscle. Skeletal muscle is attached to bones and helps with movement. Cardiac muscle is found the heart helping the heart to contract and pump blood through an organism. Smooth muscle lines the walls of organs in the digestive and urogenital tracts.

The process begins while a muscle is relaxed in its resting state. “In the resting state,

First, before this assignment I had no idea of the levels involved in a muscle contraction. We can directly control or regulate the activity of our skeletal muscles. Striated muscle movement, produced by the interaction of filaments containing the proteins myosin and actin, is regulated by the proteins tropomyosin and troponin on the actin filaments. When an electrical signal passes down the motor nerve to a muscle it triggers a depolarization of the muscle membrane (sarcolemma). In results, triggers the sarcoplasmic reticulum to release calcium ions into the muscle interior where they bind to troponin, which causes tropomyosin to shift the actin filament to which myosin heads need to bind to produce contraction.

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

There are the Smooth, the Skeletal, and the Cardiac muscular tissues. Smooth muscles are made of spindle-shaped cells.

1. Discuss the relationship between distribution of muscle fiber type and performance. How might exercise training modify or change a person’s fiber-type distribution?

Scientists have come a long way in the research relating to muscle contraction. In the past several decades information has been added along the way and will certainly continue into the future. It is fascinating to learn how the body moves. It relates to every one of us in every part of our day. As a student I sit in amazement at the processes that are required in every small movement we can so easily take for granted.

The termination of muscle contraction is followed by muscle relaxation, which is a return of the muscle fibers to their low tension-generating state. OBJECTIVE: To become familiar with the skeletal

In mammals, there are an abundant amount of varying systems and components that all work together in order for the body to function properly and sustain life; one of those components that have a great portion of responsibility is the skeletal muscle. Skeletal muscle is responsible for a great portion of movements of the body, such as transportation, obtaining food, and fight or flight responses. Muscles are composed myofibrils, which when grouped together forms muscle fibers and when those are grouped together they form muscles fascicles; multiple muscle fascicles are formed together to form skeletal muscles. All skeletal muscles are motor neuron-dependent and composed of muscle fibers that are innervated by a motor axon and together form what is known as the motor unit. The muscle fibers all work together to form a muscle contraction, which is initiated by a neuronal action potential. The action potential can be activated one of two ways, it can be either voluntary by the person or it can be in voluntary, which would include electrical stimulation to the peripheral nerve. After the action potential is initiated, a neurotransmitter is released in the neuromuscular junction, which results in the depolarization of the muscle or a contraction (Schiaffino, Blaauw, & Dyar, 2016).

Cell structures are a very unique component in life. Cells have the ability to accomplish many tasks. Theses tasks may include identifying genetic information, the gossamer endoplasmic reticulum subway system and the fibril laced cytoskeleton. All of these parts are needed in order to have life.

Smooth muscle: is normally found in the internal organs such as blood vessels, digestive tract, bladder and the womb. It is capable of tightening and pushing the food through the gut. Smooth muscle cells are in line to one another and act as a single unit.