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 (B)</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 (A)</p> Signup and view all the answers

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

<p>Both types equally (A)</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 (B)</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 (D)</p> Signup and view all the answers

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

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

What is the role of afferent feedback in walking?

<p>Adjusts the pacemaking network (B)</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 (C)</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 (C)</p> Signup and view all the answers

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