Dynamic Gamma-Motor Neurons and Muscle Response Quiz
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Questions and Answers

What type of cells contain only AMPA receptors in the synaptic contact with photoreceptors?

  • On bipolar cells
  • Off bipolar cells (correct)
  • Horizontal amacrine cells
  • Amacrine cells
  • Which receptor is involved in the invaginate connections of on bipolar cells?

  • NMDA
  • Kainate
  • AMPA
  • mGlu6 GPCR (correct)
  • What is the role of inhibitory interneurons close to the axon hillock?

  • Allow Na+ outflux
  • Decrease firing (correct)
  • Promote firing
  • Increase Cl- influx
  • Which neurotransmitters are involved in horizontal pathway vision?

    <p>GABA and Glycine</p> Signup and view all the answers

    What is the function of arboreal dendrites in the visual system?

    <p>Form gap junctions with on bipolar cells</p> Signup and view all the answers

    Which type of gamma-motor neurons causes contraction of intrafusal muscle fibers?

    <p>Both types equally</p> Signup and view all the answers

    What type of neurons become very responsive to acceleration and deceleration when dynamic gamma-motor neurons are active?

    <p>Spindle Ia output neurons</p> Signup and view all the answers

    Why does decreased tonic input to motor neurons result in them being less excitable?

    <p>Lowers their excitability levels</p> Signup and view all the answers

    Which region initiates walking and speed in the central nervous system?

    <p>Mesencephalic locomotor region</p> Signup and view all the answers

    What is the role of afferent feedback in walking?

    <p>Adjusts the pacemaking network</p> Signup and view all the answers

    How does stretching of muscles impact muscle activation in the locomotion pattern generator?

    <p>Prolongs the swing phase</p> Signup and view all the answers

    When would a pace maker neuron trigger a transition from stance to swing phase?

    <p>At the very beginning of the swing phase</p> Signup and view all the answers

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