PNB 2264 Final UPDATED Exam Questions and CORRECT Answers
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Course
PNB 2264
Institution
PNB 2264
PNB 2264 Final UPDATED Exam
Questions and CORRECT Answers
Which of the following sequences correctly list the density of voltage gated sodium channels
from lowest to highest?
a. Axon terminal, internode, node
b. Node, axon terminal, internode
c. Node, internode, axon terminal
d. Axon term...
PNB 2264 Final UPDATED Exam
Questions and CORRECT Answers
Which of the following sequences correctly list the density of voltage gated sodium channels
from lowest to highest?
a. Axon terminal, internode, node
b. Node, axon terminal, internode
c. Node, internode, axon terminal
Some primary afferent neurons synapse directly with dendrites of the alpha motor neurons in
the spinal cord. The afferent axon enters the spinal cord was the ______ and the synapse
would be located in the _____ of the spinal cord
a. Dorsal root, dorsal root ganglion
b. Dorsal root, ventral horn
c. Ventral root, dorsal root
The brachial plexus supplies ____ innervation to the ______
a. Sensory and motor, upper extremities
b. Only sensory, upper extremity
c. Only motor, lower extremity
d. Sensory, neck - CORRECT ANSWER- ✔✔a. Sensory and motor, upper extremities
Axons travelling together in the CNS makes up
a. Ganglia
b. Gray matter
,c. Nuclei
d. Nerves
e. Tracts - CORRECT ANSWER- ✔✔e. Tracts
A motor unit consist of
a. One muscle fiber and all the neurons that control it
b. One axon terminal branch and the myofibrils it controls
c. The muscle fibers that make up a particular muscle group (e.g motor cuff).
d. One neuron and the muscle fibers under its control - CORRECT ANSWER- ✔✔d. One
neuron and the muscle fibers under its control
In the nervous system, communication through the synapse is most often:
a. Chemical
b. Electrical
c. Mechanical
d. None of the above - CORRECT ANSWER- ✔✔a. Chemical
In a typical neuron, signal input primarily occurs at
a. The dendrites
b. The soma
c. The axon hillock
d. The synaptic knob (axon terminal) - CORRECT ANSWER- ✔✔a. The dendrites
UNLIKE nuclei, ganglia
a. Consist of white matter
b. Consist of gray matter
, c. Are located in the CNS
d. Are located in the peripheral nervous system - CORRECT ANSWER- ✔✔d. Are located in
the peripheral nervous system
Afferent neurons carrying information about touch from your finger, including two point
discrimination, are categorized structurally as ____
a. Unipolar neurons
b. Multipolar neurons
c. Bipolar neurons
d. Mechanoreceptors
e. Interneurons - CORRECT ANSWER- ✔✔a. Unipolar neurons
Assume neuron 1 makes an axo-axonic synapse with neuron 2. What can you predict about
the mechanism of the inhibition?
a. Inhibitory neuron 1 will prevent neuron 2 from action potential
b. Inhibitory neuron 1 will reduce the amount of the transmitter by neuron 2
c. IPSPs will be produced in neuron 2
d. All of the above - CORRECT ANSWER- ✔✔b. Inhibitory neuron 1 will reduce the
amount of the transmitter by neuron 2
Stimulus modality energy is converted to a receptor potential by the process of
a. Presynaptic facilitation
b. Analog to digital conversion
c. Summation
d. Sensory transduction
e. Motor transduction - CORRECT ANSWER- ✔✔d. Sensory transduction
The ability to precisely localize the origin of a stimulus is enhanced by
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