Neural Signaling Pathway
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Questions and Answers

What is the first step in the neural signaling process?

  • Action by effectors the muscles and glands
  • Integration by interneurons in the central nervous system (CNS)
  • Reception of information by a sensory receptor (correct)
  • Transmission by an afferent neuron to the central nervous system (CNS)
  • What is the function of interneurons in the central nervous system (CNS)?

  • To transmit information from the CNS to effector cells
  • To detect internal stimuli
  • To transmit impulses from sensory receptors
  • To sort and interpret information (correct)
  • What is the function of the myelin sheath?

  • To insulate and facilitate the transmission of signals (correct)
  • To transmit electrical and chemical signals
  • To nourish and support neurons
  • To detect external stimuli
  • What is the function of glial cells?

    <p>To support and nourish neurons (B)</p> Signup and view all the answers

    What is the term for the gaps in the myelin sheath between successive Schwann cells?

    <p>Nodes of Ranvier (B)</p> Signup and view all the answers

    What is the term for a mass of neuron cell bodies in the PNS?

    <p>Ganglion (D)</p> Signup and view all the answers

    What occurs during the integration of neural signals?

    <p>Neural signals are summed (C)</p> Signup and view all the answers

    What is the function of convergence in neural circuits?

    <p>To allow a single neuron to be affected by converging signals from multiple presynaptic neurons (C)</p> Signup and view all the answers

    What is the role of reverberating circuits in the nervous system?

    <p>To influence rhythmic breathing, mental alertness, and short-term memory (A)</p> Signup and view all the answers

    What is the characteristic of a divergent neural circuit?

    <p>A single presynaptic neuron stimulates many postsynaptic neurons (A)</p> Signup and view all the answers

    What is necessary for reverberating circuits to function?

    <p>Positive feedback (D)</p> Signup and view all the answers

    What is the primary function of oligodendrocytes in the Central Nervous System (CNS)?

    <p>To form myelin sheaths around axons (C)</p> Signup and view all the answers

    What is the resting potential of a neuron and what is its magnitude?

    <p>Polarized, -70 mV (B)</p> Signup and view all the answers

    What is the role of voltage-activated ion channels in generating an action potential?

    <p>To open and allow Na+ ions to flow into the neuron (A)</p> Signup and view all the answers

    What is the purpose of the refractory period in neuronal transmission?

    <p>To prevent the neuron from transmitting multiple action potentials (C)</p> Signup and view all the answers

    What type of conduction occurs in myelinated neurons?

    <p>Saltatory conduction (C)</p> Signup and view all the answers

    What is the function of neurotransmitters in synaptic transmission?

    <p>To bind to receptors on the postsynaptic neuron, transmitting signals (C)</p> Signup and view all the answers

    What is the purpose of the sodium-potassium pump in maintaining the resting potential of a neuron?

    <p>To maintain the ion gradients across the membrane (A)</p> Signup and view all the answers

    What is the difference between EPSPs and IPSPs?

    <p>EPSPs are excitatory, while IPSPs are inhibitory (B)</p> Signup and view all the answers

    What is the role of calcium ions in synaptic transmission?

    <p>To fuse synaptic vesicles with the presynaptic membrane, releasing neurotransmitters (A)</p> Signup and view all the answers

    What is the purpose of neural integration?

    <p>To sum the incoming signals, determining the neuron's response (A)</p> Signup and view all the answers

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