Actin and myosin

• [DOCX File]Sewanhaka High School

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  The myosin head now binds to actin and forms a crossbridge. 7. ADP and P i . are released from myosin, which causes the myosin to move. This movement is called the power stroke.8. ATP binds to myosin causing it to release the actin and reverting ATP into ADP and P i. The myosin is now ready to form another crossbridge and the cycle of ...

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• [DOCX File]P4.2.5.RigorMortis

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  actin, myosin, troponin, tropomyosin, Ca2+ ions, ATP, neuromuscular junction, and sarcoplasmic reticulum. Each component of the model should be clearly labeled. The model must clearly show the sequence of events that must occur for a sarcomere to shorten and to go back to its original length.

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• [DOC File]Laboratory 6-Protein Isolation From Fish and Western Blotting

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  Each myosin molecule contains a head that is bound to ATP. In order for the contraction to occur, the myosin head binds the actin. Then, ATP is hydrolyzed allowing the slide along the actin filament, thus shortening the sarcomere. Actin and myosin are the major players for a muscle contraction to occur, and are conserved across all animal species.

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• [DOC File]Actin and Myosin Online Lab - Mrs. Ahrens' Science Site

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  Thick filaments are made up of myosin. Thin filaments are made of actin. Describe muscle contraction. Name three facts about the myosin structure. What fuels myosin activity? Describe a hopping motion. How does the reaction mechanism of actin and myosin work? Place X’s in the appropriate boxes.

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• [DOC File]Anatomy and Physiology Unit 5 Test Review

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  The myofilaments are protein filaments (actin: thin and myosin: thick) where the sliding occurs and where ATPase enzymes are used to break down ATP for energy. Explain each of the following terms: A band, I band, actin, myosin, thin filament, thick filament, myosin heads (crossbridges). Be sure to include any specifics discussed in class.

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• [DOC File]The Sliding Filament Theory

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  The conformation change results in a “cocking” of the myosin head and prepares it for the next step. Step 3: Myosin head attaches to actin myofilament. At this point, the myosin head enters its high-energy configuration and binds to the actin myofilament. Before this step, the ADP and Pi are still bound to the myosin head.

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• [DOC File]12 Steps to Muscle Contraction

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  Actin and myosin bind together to form a cross bridge. The myosin heads then pull the actin filaments inward and release the ADP and Pi and return to a low energy position. The myosin is now ready for more ATP to bind and repeat the cycle. This process will continue for as long as there are Ca+ ions and ATP available.

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• [DOC File]Summary of the Biochemical Events of Muscle Contraction:

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  When tropomyosin is in place, actin and myosin are prevented from binding. The Sarcomere. The sarcomere is the functional unit of skeletal muscle. A functional unit is the smallest part of the ‘whole’ that does the job of the entire structure. A sarcomere is the smallest element in skeletal (and cardiac) muscle that contracts and generates ...

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• [DOC File]Sliding Filament Theory

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  This tropomyosin slides over, exposing the binding sites on actin. Page 20. Step 2: Binding of Myosin to Actin • The animation shows the hinge on the tail of the myosin bending and the energized myosin head binding into the actin. ** Note during this entire step, the myosin head is in its high energy, upright position.

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• [DOC File]Muscular System

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  N. Binding sites on the actin are exposed. O. ATP splits to ADP and P. P. A second ATP binds to the myosin to break the actin/myosin link. Q. The myosin is repositioned for another powerstroke. 30. Arrange the following events in order in the process of a muscle relaxing. A. ACH is broken down by an enzyme. B. Actin / myosin links break apart

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• [DOC File]Biology 12 - Biologically Important Molecules – Review ...

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  function example transport hemoglobin enzymes maltase, trypsin, pepsin immune system components antibodies structural components collagen, muscle movement muscle (e.g. actin & myosin fibres) chemical messengers peptide hormones (e.g. insulin) 19.

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• [DOCX File]UNIT 6 – Muscular system

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  Actin – Myosin – Muscle Fiber Contraction . Motor Neuron – T-Tubules – Sarcoplasmic Reticulum – Myosin / Actin Interaction - Muscle Belly - Factors influencing contraction strength/endurance. Muscle Fiber Summation.

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• [DOC File]Chapter 9 Muscle - Los Angeles Mission College

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  Ca actin and myosin bind. put it together. resting myosin extended w/ ADP. stimulus Ca . cross bridge formation myosin and actin bind actin knocks off ADP. power stroke w/o ADP, myosin bends myosin bend pulls actin detachment ATP binds to myosin head breaks bond with actin ...

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• [DOC File]Muscle contraction

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  Actin. is a globular protein whose molecules are arranged into long chains that are twisted around one another to form a helical strand. 3. Tropomyosin. forms long thin threads that are wound around actin filaments. Myosin filaments have globular heads that are hinged so they can move back and forth. Each myosin head has a binding site for ...

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