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Define the terms insertion and origin, in relation to muscle movement
- 1) Attachment to a moveable bone
- 2) Attachment to an immovable bone
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List three functions of muscle
Movement, Heat production, and Posture
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Explain muscle fatigue, the oxygen debt, and how the oxygen debt is ''paid''
Oxygen is required to move ATP
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Differentiate among the endomysium, perimysuim, and epimysium
- 1) Covering of each individual muscle fiber
- 2) Covers each fasicle
- 3) Covers all fasicle
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Define rigor mortis. Why does it occur?
Stiffening of the joints and muscles of a body after death. ATP is no longer produced
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What is the difference in tendons and ligaments?
Tendons attach to bones and ligaments attach bone to bone
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What is one contractile unit of a muscle?
Sarcomere
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What are the three jobs at ATP during muscle contraction?
- 1) Energizing the power stroke
- 2) Disconnecting the myosin crossbridge
- 3) Transporting calcium
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What are the six molecules involved in a skeletal muscle contraction?
Myson, Actin, Tropomysin, Troponin, ATP, Calcium ions
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What is the length of one sarcomere?
Z line to Z line
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Where does calcium bind?
Troponin
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What is a cross bridges?
Myosin head
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What are the two filaments and the difference in each?
- Myosin (Thick)
- Actin (Thin)
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Found in internal organs
Smooth muscle
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Attached to bone
Skeletal muscle
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What is a bundle of muscle fibers called?
Fascicle
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Each fascicle is surrounded by _____
Perimysium
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The whole muscle is covered by ___
Fascia
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