Muscle Spindle and Somatic Sensory System Quiz
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Questions and Answers

What is the role of Golgi tendon organs in skeletal muscles?

  • Stabilizing actin-myosin crossbridges in the absence of ATP
  • Sensory receptors providing data to the central nervous system (correct)
  • Supplying ATP to muscle fibers during activity
  • Initiating muscle contraction at the neuromuscular junction
  • What occurs in skeletal muscles when mitochondrial activity stops after death?

  • Increased myelination of motor nerves
  • Rigor mortis due to stable actin-myosin crossbridges (correct)
  • Enhanced ATP production by mitochondria
  • Decreased muscle rigidity
  • Where do myelinated motor nerves branch out within skeletal muscles?

  • Sarcoplasmic reticulum
  • Perimysium (correct)
  • Endomysium
  • Epimysium
  • What is the structure where the terminal branches of motor axons make contact with muscle fibers?

    <p>Neuromuscular junction</p> Signup and view all the answers

    What covers the terminal portion of the axon at the neuromuscular junction?

    <p>(Schwann) cell with its external lamina</p> Signup and view all the answers

    What type of neurons originate in the spinal cord or brainstem to innervate skeletal muscle fibers?

    <p>Motor neurons</p> Signup and view all the answers

    Where do unmyelinated terminal twigs from motor nerves form synapses with individual muscle fibers?

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

    What do proprioceptors in striated muscles serve as?

    <p>Sensory receptors providing data to CNS</p> Signup and view all the answers

    In rigor mortis, what accounts for the rigidity of skeletal muscles?

    <p>Stable actin-myosin crossbridges in the absence of ATP</p> Signup and view all the answers

    What do motor axons terminate on at the neuromuscular junction?

    <p>Motor end plate on muscle fiber</p> Signup and view all the answers

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