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What is the main role of tendons in the muscular system?

  • To store glycogen for muscle contraction
  • To facilitate nutrient exchange within muscle fibers
  • To provide a flat attachment surface for muscles
  • To connect muscles to bones and transfer force (correct)

    • What structural role do T-tubules serve within skeletal muscle fibers?

  • To connect the sarcolemma with the sarcoplasmic reticulum (correct)
  • To initiate nerve impulses for muscle movements
  • To store calcium ions for muscle relaxation
  • To produce ATP for muscle contraction

    • Which feature distinguishes an aponeurosis from a tendon?

  • Its shape as a flat, sheet-like structure (correct)
  • The hierarchical structure of collagen fibers
  • The presence of blood vessels and nerves
  • Its composition of loose connective tissue

    • What critical function do blood vessels play in relation to skeletal muscle?

    <p>To supply oxygen and nutrients while removing waste products</p> Signup and view all the answers

    Which of the following accurately describes the composition of the sarcoplasmic reticulum?

    <p>Interconnected tubules that surround myofibrils</p> Signup and view all the answers

    What is the primary function of skeletal muscles in relation to body movement?

    <p>They attach to the skeleton and move bones.</p> Signup and view all the answers

    Which characteristic of skeletal muscle allows muscles to be stretched by opposing muscles?

    <p>Extensibility</p> Signup and view all the answers

    Which connective tissue layer surrounds the entire skeletal muscle?

    <p>Epimysium</p> Signup and view all the answers

    What role does heat generation play in the function of skeletal muscles?

    <p>It helps maintain normal body temperature.</p> Signup and view all the answers

    What does the term 'excitability' refer to in the context of skeletal muscle cells?

    <p>The ability to respond to nerve signals and stimulate contraction.</p> Signup and view all the answers

    What happens to skeletal muscle after it is stretched?

    <p>It tends to recoil and resume resting length.</p> Signup and view all the answers

    Which of the following is NOT a function of skeletal muscle?

    <p>Digestion of food</p> Signup and view all the answers

    What is the purpose of the perimysium in skeletal muscle tissue?

    <p>To surround fascicles of muscle fibers.</p> Signup and view all the answers

    What is the primary characteristic of circular muscles?

    <p>They consist of fascicles arranged in concentric rings.</p> Signup and view all the answers

    Which muscle arrangement is characterized by fascicles converging towards a single insertion tendon?

    <p>Convergent</p> Signup and view all the answers

    What defines a fusiform muscle?

    <p>A muscle that is spindle-shaped with an expanded midsection.</p> Signup and view all the answers

    Which type of pennate muscle has fascicles inserting into only one side of the tendon?

    <p>Unipennate</p> Signup and view all the answers

    What is true about the range of motion and power of muscles based on their fascicle arrangement?

    <p>Muscle power is more directly related to the number of muscle cells than to fascicle length.</p> Signup and view all the answers

    What structural unit is responsible for muscle contraction?

    <p>Sarcomeres</p> Signup and view all the answers

    Which type of filament is primarily composed of actin?

    <p>Thin filaments</p> Signup and view all the answers

    What is the A band in a sarcomere characterized by?

    <p>Overlapping thick and thin filaments</p> Signup and view all the answers

    Which structure marks the boundaries of each sarcomere?

    <p>Z discs</p> Signup and view all the answers

    What is the role of ATPase enzymes associated with the thick filaments?

    <p>To split ATP for energy</p> Signup and view all the answers

    What is indicated by the I band in a sarcomere?

    <p>Only thin filaments present</p> Signup and view all the answers

    Which structure holds the thick filaments together at the center of the H zone?

    <p>M line</p> Signup and view all the answers

    Which of the following best describes the relationship between myofilaments and myofibrils?

    <p>Myofibrils contain myofilaments</p> Signup and view all the answers

    Which muscle type is characterized by being involuntary and striated?

    <p>Cardiac muscle</p> Signup and view all the answers

    What is the term used to describe a muscle with two origins?

    <p>Biceps</p> Signup and view all the answers

    What does the term 'rectus' indicate about the direction of muscle fibers?

    <p>Fibers run parallel to an imaginary line</p> Signup and view all the answers

    Which of the following correctly describes the sarcolemma?

    <p>The membrane surrounding a muscle fiber</p> Signup and view all the answers

    What muscle classification term refers to the smallest muscle in a group?

    <p>Minimus</p> Signup and view all the answers

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