Muscle Structure and Function
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Questions and Answers

Which type of muscle is responsible for stabilizing the origin of the agonist and the joint that the origin moves over?

  • Fixators (correct)
  • Longus
  • Maximus
  • Minimus
  • What muscle is named for its location around the cranium?

  • Epicranius (correct)
  • Serratus
  • Tibialis Anterior
  • Brachioradialis
  • Which muscle is named for its shape resembling a triangle?

  • Orbicularis
  • Rhomboideus
  • Trapezius
  • Deltoid (correct)
  • What muscle is responsible for extending the fingers?

    <p>Extensor digitorum</p> Signup and view all the answers

    What is the function of tropomyosin in muscle contraction?

    <p>To control muscle contraction</p> Signup and view all the answers

    What is the primary function of myosin in muscle fibers?

    <p>To form cross bridges with actin during muscle contraction</p> Signup and view all the answers

    Which protein is responsible for the depolarization of muscle fibers?

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

    What is the function of sarcolemma in the neuromuscular junction?

    <p>To create a pocket formed around motor neuron</p> Signup and view all the answers

    Which type of muscle contraction occurs when the muscle exerts force without changing length?

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

    In the context of skeletal muscles, what is the origin?

    <p>The attachment of the muscle to the bone which remains stationary</p> Signup and view all the answers

    Which muscle is named after the smallest size?

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

    Which muscle is a fixator around the hip joint?

    <p>Psoas major</p> Signup and view all the answers

    Which muscle assists in stabilizing the elbow during flexion and extension?

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

    Which muscle is named for its action of extending the fingers?

    <p>Extensor digitorum</p> Signup and view all the answers

    What is the function of tropomyosin in muscle contraction?

    <p>Inhibiting the interaction between actin and myosin</p> Signup and view all the answers

    What is the primary function of troponin in muscle fibers?

    <p>Controlling the position of tropomyosin on actin filaments</p> Signup and view all the answers

    What is the role of acetylcholine at the neuromuscular junction?

    <p>Inducing muscle fiber depolarization</p> Signup and view all the answers

    What is the function of sarcolemma in muscle contractions?

    <p>Conducting the action potential into the muscle fiber</p> Signup and view all the answers

    What is the primary role of the Z line in muscle contractions?

    <p>Anchoring actin filaments to the sarcomere</p> Signup and view all the answers

    What is the primary function of myosin heads (cross bridges) during muscle contractions?

    <p>Interacting with actin filaments to generate muscle force</p> Signup and view all the answers

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