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    into muscle cells and analyze for presence of myosin light chain. Utilizing Western Blotting techniques and using specific antibodies helped to detect myosin light chain. The hypothesis was that proliferating myoblasts could be induced to initiate the differentiation process by depriving the cells of the necessary growth factors and that the differentiation is characterized by the expression of muscle-specific proteins. The results showed that that myosin light chain was not present. It was concluded

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    Myosin Lab Report

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    William Perez Cell Biology 2440 Lab on protein Myosin Proteins are chains of amino acids that perform the most important functions in living organism. Every protein will contain an amino group‚ carboxyl group‚ a different R group and an alpha carbon with two hydrogens. There are nine types of functions proteins can have‚ enzymes‚ motor‚ receptor‚ structural‚ storage‚ transport‚ signaling‚ and special purpose proteins(antibodies). There are four levels of protein structure‚ primary‚ secondary

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    Biochemistry of Muscle Contraction Fred P. Guillergan M.D.‚ FPCP Outline  histology and biochemistry of muscles (Striated & smooth) – Myosin – Actin‚ Tropomyosin‚ Troponin – Accessory proteins of muscles Biochemical events in muscle contraction Calcium‚ Ca2+-binding proteins and Ca2+ channels in muscle contraction Biochemistry of Cardiac & Smooth muscle contraction Energetics of muscle contraction ☻Able to understand the normal anatomy and physiology of different types of muscles

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    Muscle Contraction Essay

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    body. Myosin and Actin is an interaction protein to Muscle Contraction‚ it can be changed by shape but not by volume. Skeletal Muscle contraction is produce by heat. The muscles may receive signal from the brain. Once it receives signal it expands or contracts. Skeleton can provide muscle movement and frame work. This kind of muscle can be found attached your bones. Filaments there are only two types of sliding filaments. The Thick Filaments is called “Myofliaments”. Myofliaments produces myosin. Myosin

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    Skeletal Muscle

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    Animals have three types of muscles; skeletal‚ smooth‚ and cardiac. This lab however is only concerned with skeletal muscle. A special characteristic of skeletal muscle is their ability to contract or shorten via thin (actin) and thick (myosin) filaments (Flanagan‚2017). This gives a striated appearance which is a key distinguishing characteristic between other types of muscle (Flanagan‚2017). Skeletal muscle is also multinucleated. Skeletal muscle needs plentiful amounts of energy to be able to

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    Work

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    Chapter 9: Muscular System: Histology and Physiology Multiple Choice 1. The capacity of a muscle cell to shorten forcefully is known as A) contractility. B) excitability. C) extensibility. D) elasticity. E) flexibility. Answer: a Level: 1 2. Muscles exhibit the property of excitability. This means that the muscle A) shortens its length. B) recoils to its original resting length. C) stretches beyond its normal length. D) responds to stimulation by the nervous system. E)

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    Paper

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    Filament theory 1. ATP binds to myosin (45°). This causes an affinity change‚ and myosin is released from actin. 2. ATP ADP + Pi and myosin heads are cocked to 90° 3. Myosin heads bind to actin to form a cross-bridge 4. Pi released‚ and myosin springs back to 45°. Actin is pulled over myosin and toward the center of the sarcomere. This causes shortening of the sarcomere and is referred to as the “power stroke” 5. ADP is released‚ but myosin remains bound to actin (rigor state)

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    Muscle Notes

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    Sarcomere- smallest contractile element of muscle fiber‚ extends from z-line to z-line Myofilament- responsible for contraction Striated- the color variations on the muscle fiber. Has to do with the amount of protein and the way it reflects light. Myosin- globular protein Bulb like heads come in contact with the active sites on actin Active sites are not exposed when in the resting position. Tropomysin- the regulatory protein the hides the active sites when not stimulated Sarcoplasmic reticulum-

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    called actin and myosin filaments. These filaments slide in and out between each other to form a muscle contractions‚ hence the sliding filament theory!  The diagram above shows part of a myofibril called a sarcomere. This is the smallest unit of skeletal muscle that can contract. Sarcomeres repeat themselves over and over along the length of the myofibril. The structures involved: Myofibril: A cylindrical organelle running the length of the muscle fibre‚ containing Actin and Myosin filaments.

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    Sliding Filament Theory

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    and finally to the muscle fiber ( cell) inside of the muscle fibers of the myofibril‚ inside of that is the those and thin filements. The thin filament is called actin and the thick filament called myosin. The actin is connected  to the z line.the actin and myosin stick up in between each other‚ the myosin has two separate actin filaments on the ends of it‚ this whole little section is called sarcomeres. in the muscle fiber these sections of  sarcomere pair up next to each other so that the connection

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    Introduction Muscle tissue is composed of as many as 19 different proteins; the largest components are myosin and actin. All muscle tissue contains actin and myosin; these form the fibers that slide past each other as muscles contract and relax.  There are also a number of other proteins found in muscle tissue; these other proteins regulate movement‚ bundle and anchor actin and myosin along with others functions. As species have evolved‚ they have diverged in the quantities and types of these

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    Metabolic Superstorm

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    T tubules triggering 6. release of Ca from the cisternae of the sarcoplasmic reticulum 7.    CA binds to troponin 8.    Troponin changes shape and shifts tropomyosin to expose binding sites of actin 9.    myosin binds to actin (cross bridge is formend)(ADP released from myosin) 10.    Myosin head pivots (pulling actin) 11.

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    Muscle Contraction

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    in which the myosin head is damaged and there are less actin binding to less myosin effecting the force production. The length tension relationship is dependent on the number of cross-bridges that are formed‚ which decreases when they are not generating at the usual amount. In relation to the length-tension relationship‚ when a muscle is contracting at an angle in which the muscle should have greater force‚ it will not because of the lack of actin-myosin overlap. So when the myosin head pivots‚ there

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    Sliding Filament Theory

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    ________ 1. Myosin heads bind to active sites on actin molecules ________ 2. ATP is hydrolyzed. ________ 3. Myosin heads return to their cocked position ready for the next working stroke. ___1____ 4. Calcium ions bind to troponin. ________ 5. Cycling continues until calcium ions return to the SR. ________ 6. Myosin cross bridges detach from actin. ________ 7. Troponin changes shape. ________ 8. ADP and inorganic phosphate are released from the thick filament. ________ 9. Myosin heads pull

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    and thin filament simply enough. The thick filaments are made up of protein molecules called myosin. “A myosin molecule is shaped like a golf club‚ with two polypeptides intertwined to form a shaft like tail and a double globular head projecting from it at an angle” (Saladin.408). Thin filaments have three main components called actin‚ tropomyosin‚ and troponin. For a muscle to contract the myosin will bind with actin. The tropomyosin and troponin work together to cover the actin binding site

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    Jeremy lamb

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    True  What is the role of tropomyosin in skeletal muscles? A) Tropomyosin is the name of a contracting unit. B) Tropomyosin serves as a contraction inhibitor by blocking the myosin binding sites on the actin molecules. C) Tropomyosin serves as a contraction inhibitor by blocking the actin binding sites on the myosin molecules. D) Tropomyosin is the receptor for the motor neuron neurotransmitter. B)  The strongest muscle contractions are normally achieved by ________. A) increasing stimulus

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    Chapter 9: Muscles and Muscle Tissue‚ Lecture Outline: I. Overview of Muscle Tissues (pp. 276–278; Table 9.1) A. Types of Muscle Tissue (p. 277; Table 9.1) 1. Skeletal muscle is associated with the bony skeleton and consists of large cells that bear striations and are under voluntary control. 2. Cardiac muscle occurs only in the heart and consists of small cells that are striated and under involuntary control. 3. Smooth muscle is found in the walls of hollow organs and

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    wernicks area, brain

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    Running/Exercising= more C02 is needed Actin is attached to the Z Line Myosin is in the middle attached by M line (Desmin) Located within the A- band‚ Titin is also attached to myosin anchoring it to the Z line. Myosin has heads on it‚ which attach to the active site on Actin when contracted. Alternating heads that attach to actin (like tug a war). When the muscle is resting the myosin heads are flat. Sliding Filament Therory I band is the clear

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    How a Muscle Contracts

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    acetylcholine then combines with receptors to stimulate movement‚ or a muscle impulse. As a result‚ calcium ions flood into to the sarcoplasmic reticulum. This forms connections between the actin and myosin filaments. A cross bridge is attached to a myosin filament and when the actin filament slides opposite of the myosin‚ the cross bridge forms new links. All of this can be accomplished only if there is an energy source. The energy source for movement of a muscle contraction called ATP. ATP is stored in cells

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    Human Muscular System

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    Devonne Lozada Living Environment 1/8/13 Mr.Jorez Human Muscular System Visceral muscle is found inside of organs like the stomach‚ intestines‚ and blood vessels. The weakest of all muscle tissues‚ visceral muscle makes organs contract to move substances through the organ. Because visceral muscle is controlled by the unconscious part of the brain‚ it is known as involuntary muscle—it cannot be directly controlled by the conscious mind. The term “smooth muscle” is often used

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