Monosynaptic Spinal Reflex Quiz
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Questions and Answers

What is the main component of the stretch reflex?

  • Stimulus
  • Efferent
  • Center
  • Receptor (correct)
  • Which type of intrafusal fibers has a central area dilated with an aggregation of nuclei?

  • Nuclear chain fibers
  • Muscle spindle fibers
  • Nuclear bag fibers (correct)
  • Extrafusal fibers
  • What is the effector organ in the stretch reflex?

  • Receptor
  • Muscle spindle
  • Motor nerve
  • Skeletal muscle (correct)
  • Which type of afferent fibers encircle both nuclear bag and nuclear chain?

    <p>Primary (annulo spiral) endings</p> Signup and view all the answers

    What is the function of the secondary (flower-spray) endings in the muscle spindle?

    <p>Encircle nuclear chain fibers only</p> Signup and view all the answers

    Which type of fibers are smaller than nuclear bag fibers and have one line of nuclei spread in a chain along the receptor area?

    <p>Nuclear chain fibers</p> Signup and view all the answers

    What is the role of the central non-contractile area in the intrafusal fiber?

    <p>Receptor area</p> Signup and view all the answers

    Which component of the stretch reflex consists of anterior horn cells (AHCs)?

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

    Which type of fiber is smaller than extrafusal fibers and lies in parallel with muscle fibers?

    <p>Intrafusal fibers</p> Signup and view all the answers

    What is the function of primary (annulo spiral) endings in the muscle spindle?

    <p>Encircle both nuclear bag and nuclear chain</p> Signup and view all the answers

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