MCQ Questions
Q.1.
Which of the following describes a B fiber?
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    tetrodotoxin and lidocaine
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    medium diameter, lightly myelinated
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    The number of action potentials decreased.
  • 0%
    An action potential was always seen at R1.
Q.2.
Which of the following is used to block pain?
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    medullary region
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    lidocaine
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    medium diameter, lightly myelinated
  • 0%
    tetrodotoxin and lidocaine
Q.3.
The nodes of Ranvier are _______.
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    locations on the axon where the myelin sheath is absent
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    similar, but tetrodotoxin had a greater effect
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    entering the cell must overcome the potassium exiting
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    lower than potassium intracellularly.
Q.4.
The conducting region of the neuron is the _______.
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    leakage
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    axon
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    similar, but tetrodotoxin had a greater effect
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    lidocaine
Q.5.
The minimum voltage that is required to generate an action potential is called the _______.
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    lower than potassium intracellularly.
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    threshold voltage
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    hyperpolarized
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    medullary region
Q.6.
A nerve is _______.
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    threshold voltage
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    medullary region
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    a bundle of axons
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    no change to the action potential
Q.7.
To reach threshold, the amount of sodium _______.
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    similar, but tetrodotoxin had a greater effect
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    is called the conduction velocity and is measured in meters/sec
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    entering the cell must overcome the potassium exiting
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    decreases the time between action potentials
Q.8.
We describe the regeneration of the action potential down the membrane of the axon of the neuron as ______.
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    An action potential was always seen at R1.
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    conduction or propagation
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    no change to the action potential
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    sodium-potassium pump
Q.9.
The typical concentration of sodium is _______.
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    no change to the action potential
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    the largest and most heavily myelinated axons
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    lower than potassium intracellularly.
  • 0%
    An action potential was always seen at R1.
Q.10.
Which of the following blocks voltage-gated sodium channels?
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    medullary region
  • 0%
    The number of action potentials decreased.
  • 0%
    tetrodotoxin and lidocaine
  • 0%
    The receptor potential is carried by neuroglia.
Q.11.
The channels that provide for the movement of potassium in the resting neuron are _______.
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    voltage
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    C fibers
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    trigger zone
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    leakage
Q.12.
The rate with which an action potential travels along an axon ____.
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    the largest and most heavily myelinated axons
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    entering the cell must overcome the potassium exiting
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    is called the conduction velocity and is measured in meters/sec
  • 0%
    similar, but tetrodotoxin had a greater effect
Q.13.
Which fibers generate the smallest value for conduction velocity?
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    medullary region
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    lidocaine
  • 0%
    The number of action potentials decreased.
  • 0%
    C fibers
Q.14.
The region on the neuron where action potentials are generated is called the ______.
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    trigger zone
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    threshold voltage
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    leakage
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    hyperpolarized
Q.15.
Increasing the amount of myelination _____.
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    entering the cell must overcome the potassium exiting
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    decreases the time between action potentials
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    no change to the action potential
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    the largest and most heavily myelinated axons
Q.16.
Which of the following occurred in the presence of tetrodotoxin?
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    The receptor potential is carried by neuroglia.
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    The number of action potentials decreased.
  • 0%
    An action potential was always seen at R1.
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    medium diameter, lightly myelinated
Q.17.
If an increase in extracellular potassium hyperpolarizes a neuron, which of the following would be correct?
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    It would change the membrane potential to a more negative value.
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    entering the cell must overcome the potassium exiting
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    is called the conduction velocity and is measured in meters/sec
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    a receptor potential, a synaptic potential or an action potential
Q.18.
What effect did increasing the extracellular potassium have on the resting membrane potential?
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    The receptor potential is carried by neuroglia.
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    similar, but tetrodotoxin had a greater effect
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    The resting membrane potential became less negative.
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    Only a small change occurred, because the resting neuron is not very permeable to sodium.
Q.19.
Which of the following is described correctly?
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    a receptor potential, a synaptic potential or an action potential
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    medium diameter, lightly myelinated
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    Schwann cells provide the myelination in the peripheral nervous system.
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    The number of action potentials decreased.
Q.20.
The effects of lidocaine and tetrodotoxin were _______.
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    lower than potassium intracellularly.
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    the largest and most heavily myelinated axons
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    locations on the axon where the myelin sheath is absent
  • 0%
    similar, but tetrodotoxin had a greater effect
Q.21.
An action potential requires ______.
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    locations on the axon where the myelin sheath is absent
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    entering the cell must overcome the potassium exiting
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    decreases the time between action potentials
  • 0%
    voltage-gated sodium channels to open and sodium to flow with its electrochemical gradient
Q.22.
An axon that is more negative than the resting membrane potential is said to be _______.
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    threshold voltage
  • 0%
    hyperpolarized
  • 0%
    trigger zone
  • 0%
    medullary region