Cardiac muscle

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    What Are Cardiac Muscles?

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    Cardiac Muscle fibres are long cylinder shaped cells that usually have one or two nuclei, they are centrally located within the cell. The end of the fibres are split into a number of small branches in which the ends of which connect to similar branches of adjacent cells giving a three dimensional cytoplasmic connection network throughout the tissue. In between the muscle fibres, there is a delicate connective tissue, similar to the endomysium of the skeletal muscle which supports the extremely rich capillary network necessary to meet the high metabolism demands of strong and continuous activity by the cardiac muscle. Similar to the skeletal muscle, the sarcomere is the contractile unit of the myocardial cell. Between the ends of the muscle cells there are specialised intercellular junctions that are called intercalated discs. Intercalated discs are irregular transverse thickenings of the sarcolemma that contains structures that are called desmosomes and these hold muscle fibres together.…

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    Cardiac Muscle Analysis

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    I. INTRODUCTION HE versatility of muscles is a crucial factor for efficient animal locomotion. In combination with a high degree of force control muscles enable precise motions depending on the wanted action. Animal locomotion involves (a) fine motor skills like sneaking, grabbing and communication; (b) quick short term acceleration like catching prey; (c) very long-term movement patterns which need to be performed efficient like digesting, migration and sometimes even (d) avoiding motion by…

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    similarities and differences between skeletal, cardiac, and smooth muscle. Skeletal Muscles are attached to bones. Their functions include: produce skeletal movement, maintain posture and body position, support soft tissues, guard body entrances and exits, maintain body temperature, and store nutrients. They are striated muscles because of their appearances of having bands of actin and myosin that form the sarcomere which is located in the myofibrils. The skeletal muscle consists of it being…

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    The heart is one of the strongest muscles in the human body. It is mostly made up of cardiac muscle, which causes the contractions of the heart, or heartbeat. The cardiac muscle works constantly to pump blood throughout the body and is one of the three major types of muscle. The cells in the heart are closely connected so that they all beat at the same time, and they form the thick middle layer of the heart, in between the outer epicardium and the inner endocardium layers. There are two main…

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    functions and organs and also have their own fair share of problems. The muscular system composes of the tissues and organs that are used to exert a force, whether under voluntary or involuntary control. Muscles are composed of long, slender cells called fibers, and these fibers come in bundles with very few or countless amounts per bundle. Muscles move by either contracting or extending, which is directed by nerve impulses sent from the central nervous system. There are three main types of…

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    Muscular Dystrophy Paper

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    Section A “Selective Connexin43 Inhibition Prevents Isoproterenol-Induced Arrhythmias and Lethality in Muscular Dystrophy Mice” is a research paper that was conducted by Dr. Fraidenraich and his colleagues. Duchenne muscular dystrophy (DMD) is a severe form of muscular dystrophy that is life threatening and associated with muscle degeneration. It affects many newborn males, meaning that it is caused by an X-linked mutation. This mutation leads to the absence of a very important protein called,…

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    All heartbeats consist of a mechanical component and an electrical component. The heartbeat is created by cardiac depolarization caused by electrical currents that induce muscle contraction. The electrical component of the heartbeat begins in the Sinoatrial (SA) Node and its function is to send electrical impulses that stimulate your heart to beat, and these impulses induce the atria to contract. As the atria contract, the impulse moves on to the Atrioventricular (AV) node which leads the…

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    Our body functions and consumes gas (O2) differently at rest and in motion. Energy requirement to maintain the body’s condition at rest is very different than the energy requirement during maximal exercise. At rest, the muscle intake of gas is very little, but during activity, oxygen consumption is multiples due to the intense oxygen demands of the muscles. Other parameters that are expected to change during exercise are metabolic rate, heart rate and blood pressure, stroke volume, cardiac…

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    Case study one – (Explain how the musculo skeletal system structure is suited to the function it performs. (2.1) Mrs C is pregnant and wants to pick up a ball, describe in depth which parts of the musculo skeletal system are involved in this movement and which structural parts provide support and protection of the vital organs. The musculo skeletal system consists of bones of the skeleton, muscles, cartilage, tendons, ligaments and joints, they all work together to provide the body support,…

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    4_Fitbit Charge HR Accuracy (1,000 words) Fitbit Charge HR is a highly accurate fitness goal tracker that I worn on the write. Equipped with GPS and an altimeter, it will help you log your movements throughout your located. The devive tracks your heart rate, burned calories, steps, climbed floors, and distance traveled. Special modes for biking, hiking, running, and walking will provide more accurate details of your activity. The information from your daily exercise is transferred to the Fitbit…

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