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Muscle Structure

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    Define the muscle structure.
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  • Identify the letter "A" in this picture. Name it.
    Actin
  •  10
  • Identify the letter "B" in this picture. Name it.
    Myosin
  •  10
  • Identify the number 6 in the picture.
    endomysium
  •  10
  • Identify the number 7 in the picture.
    muscle fiber
  •  10
  • Identify the number 1 in the picture
    tendon
  •  5
  • Identify the number 2 in the picture.
    epimysium
  •  5
  • Identify the number 3 in the picture
    perimysium
  •  5
  • Identify the number 8 in the picture.
    blood vessel
  •  5
  • Identify the number 5 in the picture.
    fascicle
  •  10
  • The ability of a muscle to shorten with force.
    contractility
  •  5
  • Ability of a muscle to lengthen.
    extensibility
  •  5
  • The ability of muscle to return to its original length.
    elasticity
  •  10
  • The ability to receive and respond to stimuli.
    excitability
  •  10
  • When a person does not use their muscles, the muscles begin to waste away or decrease. This is called
    atrophy
  •  15
  • Building muscles and increasing the size of muscles is called
    hypertrophy
  •  15
  • What are the two types of myofilaments?
    myosin and actin
  •  15