PNB 2274 Exam 4 Questions and
Answers 100% Pass
Neurons - ✔✔-Send and receive electrical and chemical signals
-Excitable
Neuroglia/glial cells - ✔✔-Support and protect neurons
-May be involved in signal transduction
Neuron characteristics - ✔✔-High metabolic rate
-Extreme longevity
-Nonmitotic
Unipolar neuron - ✔✔-Very long axon that's fused to dendrites
-Uncommon in humans
Bipolar neuron - ✔✔-One dendrite and one axon
Multipolar neuron - ✔✔-Most common
-One axon and multiple dendrites
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,Sensory/afferent neuron - ✔✔Sends impulse from sensory receptors to the central
nervous system
Motor/efferent neuron - ✔✔Sends impulse from the CNS to muscles or glands
Interneuron - ✔✔Helps sensory and motor neurons communicate
What type of cells are most likely to be involved in brain tumors? - ✔✔Glial cells
Characteristics of glial cells - ✔✔-In both CNS and PNS
-Mitotic
-Protect and nourish neurons
-Much more abundant than neurons
-Smaller than neurons
Astrocytes - ✔✔-Maintain BBB
-Generate scaffolding for CNS
-Repair damaged neural tissue
-Cell development
-Regulates interstitial environment
Which neural cells develop first and what cells develop them? - ✔✔-Glial cells
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, -Astrocytes
Choroid plexus - ✔✔Branching network of mostly ependymal cells that produces
cerebrospinal fluid in brain ventricles
Ependymal cells - ✔✔-Ciliated cuboidal epithelial cells lining the brain ventricles and
the central canal of the spinal cord
-Produce cerebral spinal fluid (CSF) and make up the choroid plexus
-Share characteristics with stem cells
Microglial cells - ✔✔-Small and motile
-Use phagocytosis to remove cell waste
Oligodendrocytes - ✔✔-Only located in the CNS
-Wrap around axons and produce myelin
-Only glial cells that can synapse with neurons
What are oligodendrocytes called when they form synapses with neurons? -
✔✔Progenitor cells
Satellite cells - ✔✔-Aka amphicytes
-Located in the PNS
-Surround ganglia
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Answers 100% Pass
Neurons - ✔✔-Send and receive electrical and chemical signals
-Excitable
Neuroglia/glial cells - ✔✔-Support and protect neurons
-May be involved in signal transduction
Neuron characteristics - ✔✔-High metabolic rate
-Extreme longevity
-Nonmitotic
Unipolar neuron - ✔✔-Very long axon that's fused to dendrites
-Uncommon in humans
Bipolar neuron - ✔✔-One dendrite and one axon
Multipolar neuron - ✔✔-Most common
-One axon and multiple dendrites
Katelyn Whitman, All Rights Reserved © 2025 1
,Sensory/afferent neuron - ✔✔Sends impulse from sensory receptors to the central
nervous system
Motor/efferent neuron - ✔✔Sends impulse from the CNS to muscles or glands
Interneuron - ✔✔Helps sensory and motor neurons communicate
What type of cells are most likely to be involved in brain tumors? - ✔✔Glial cells
Characteristics of glial cells - ✔✔-In both CNS and PNS
-Mitotic
-Protect and nourish neurons
-Much more abundant than neurons
-Smaller than neurons
Astrocytes - ✔✔-Maintain BBB
-Generate scaffolding for CNS
-Repair damaged neural tissue
-Cell development
-Regulates interstitial environment
Which neural cells develop first and what cells develop them? - ✔✔-Glial cells
Katelyn Whitman, All Rights Reserved © 2025 2
, -Astrocytes
Choroid plexus - ✔✔Branching network of mostly ependymal cells that produces
cerebrospinal fluid in brain ventricles
Ependymal cells - ✔✔-Ciliated cuboidal epithelial cells lining the brain ventricles and
the central canal of the spinal cord
-Produce cerebral spinal fluid (CSF) and make up the choroid plexus
-Share characteristics with stem cells
Microglial cells - ✔✔-Small and motile
-Use phagocytosis to remove cell waste
Oligodendrocytes - ✔✔-Only located in the CNS
-Wrap around axons and produce myelin
-Only glial cells that can synapse with neurons
What are oligodendrocytes called when they form synapses with neurons? -
✔✔Progenitor cells
Satellite cells - ✔✔-Aka amphicytes
-Located in the PNS
-Surround ganglia
Katelyn Whitman, All Rights Reserved © 2025 3
