Notes from Powerpoint slides from class
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| What attaches skeletal muscles to bones? | Tndones
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| What does insertion mean? | More moveable attachments.
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| What does origin mean? | Less movable attachment where insertions is pulled towards.
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| Contracting muscles cause what? | Tension on tendons which move bones at a joint.
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| What are flexors? | Decrease angle of joints.
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| What are extensors? | Increase angle of joints.
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| What is the prime mover of any skeletal muscle? | An agonist muscle.
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| What are antagonist muscles? | Flexors and extensors that act on the same joint to produce opposite actions.
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| Fibrous connectice tissue from tnedons forms sheaths called ____ that extend around and into skeletal muscles. | Epimysium.
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| Inside the muscle this connective tissue divides muscles into columns called? | Fascicles.
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| The connective tissue around fascicles is called what? | Perimysiums.
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| Muscle fibers are also called _____. | Muscle cells
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| Ensheathed by thin connective tissue layers is called? | Endomysium.
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| Plasma membranes are called? | Sarcolemma.
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| Muscle fibers are similar to other cells except thay are? | Multinucleate and striated.
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| What is the most distinctive feature of sketial musclesare? | It is striated.
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| Each muscle fiber is oacked with? | myofibrils.
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| Myofibrals are packed with? | Myofilaments.
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| Myofilamengts are filled with? | Thick and thin filaments
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| What are sarcomeres? | Contractile units of skelital muscles consisting of components between 2 Z discs.
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| What are M lines? | Structural proteins that anchor myosin during contractions/
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| What is Titin? | Elastic protein attaching myosin to Z disc that contributes to the elastic recoil of muscles.
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