Mammalian Spinal Cord Motor Neurons Quiz
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Questions and Answers

What is the function of parasympathetic preganglionic motor neurons in the spinal cord?

  • Innervate the muscles of the upper limbs
  • Control involuntary actions like heart rate (correct)
  • Regulate reflex actions in the body
  • Supply the striated muscles of the axial skeleton
  • Which spinal cord segments house the parasympathetic preganglionic motor neurons in humans?

  • L3 to S1 segments
  • S2 to S4 segments (correct)
  • C5 to T1 segments
  • T2 to L2 segments
  • Where are the sympathetic preganglionic motor neurons located in the human spinal cord?

  • L3 to S1 segments
  • C5 to T1 segments
  • T2 to L2 segments (correct)
  • S2 to S4 segments
  • What is the main function of the sympathetic preganglionic motor neurons in the spinal cord?

    <p>Maintain fight-or-flight responses</p> Signup and view all the answers

    Where are the cell bodies of sensory axons located in relation to the spinal cord?

    <p>Dorsal root ganglion</p> Signup and view all the answers

    Which part of a spinal nerve contains the axons of motor neurons?

    <p>Ventral root</p> Signup and view all the answers

    What is the role of the neural crest cells in the development of the nervous system?

    <p>Give rise to melanocytes and bones of the face</p> Signup and view all the answers

    Which component is NOT part of the peripheral nervous system?

    <p>Optic and olfactory nerves</p> Signup and view all the answers

    Where do the axons of motor neurons grow until they reach their target muscle?

    <p>Schwann cells</p> Signup and view all the answers

    Which region contains motor neurons supplying the tail muscles?

    <p>Caudal region</p> Signup and view all the answers

    What is the primary function of ganglion cells in the autonomic nervous system?

    <p>Form postganglionic axons of sympathetic and parasympathetic ganglion cells</p> Signup and view all the answers

    Which cells migrate away from the dorsal surface of the neural tube to form the neural crest?

    <p>Ganglion cells</p> Signup and view all the answers

    Where are autonomic motor neurons primarily located in the spinal cord?

    <p>White matter in lamina 9</p> Signup and view all the answers

    What type of markers do somatic motor neurons in the spinal cord stain well with?

    <p>Acetylcholinesterase and NeuN</p> Signup and view all the answers

    Which types of muscles do autonomic motor neurons generally innervate?

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

    In which region of the grey matter are somatic motor neurons found in the spinal cord?

    <p>Ventral horn</p> Signup and view all the answers

    Which segment of the spinal cord contains autonomic motor neurons responsible for pelvic parasympathetic outflow?

    <p>S1 to S4</p> Signup and view all the answers

    Which feature differentiates autonomic motor neurons from somatic motor neurons?

    <p>Function of innervated muscles</p> Signup and view all the answers

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