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PNB 2264 Final Exam Questions and Answers 100% Solved
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PNB 2264 Final Exam Questions and Answers 100% Solved 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 terminal, N...

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  • October 22, 2024
  • 37
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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©JOSHCLAY 2024/2025. YEAR PUBLISHED 2024.

PNB 2264 Final Exam Questions and

Answers 100% Solved


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 terminal, Node, Internode - ✔✔a. Axon terminal, internode, node

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

,©JOSHCLAY 2024/2025. YEAR PUBLISHED 2024.

c. Ventral root, dorsal root

d. Dorsal root, ventral root - ✔✔b. Dorsal root, ventral horn

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 - ✔✔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 - ✔✔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

,©JOSHCLAY 2024/2025. YEAR PUBLISHED 2024.

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 - ✔✔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 - ✔✔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) - ✔✔a. The dendrites

UNLIKE nuclei, ganglia



a. Consist of white matter

, ©JOSHCLAY 2024/2025. YEAR PUBLISHED 2024.

b. Consist of gray matter

c. Are located in the CNS

d. Are located in the peripheral nervous system - ✔✔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 - ✔✔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

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