NSCS 170C1 Exam 1 Questions with Correct Answers
What are oligodendrocytes? - Answer-A type of glial cell that forms insulating myelin sheaths around the axons of neurons in the central nervous system.
What are microglial cells? - Answer-small cells that phagocytize bacterial cells and cellu...
NSCS 170C1 Exam 1 Questions
with Correct Answers
What are oligodendrocytes? - Answer-A type of glial cell that forms insulating myelin
sheaths around the axons of neurons in the central nervous system.
What are microglial cells? - Answer-small cells that phagocytize bacterial cells and
cellular debris
What happens to the proximal end of the neuron during injury in PNS? - Answer-it
begins to sprout axons and growth cones can be detected
What is the determining factor if the axon can regrow or not? - Answer-the environment
inhibits it
What prevents regrowth in the CNS? - Answer-slower debris clearance
Structural characteristics of the brain - Answer-frontal, parietal, temporal occipital lobes
What is an EEG and what does it measure? - Answer-Electroencephalogram, Records
the electrical activity of millions of neurons producing brain wave patterns that can be
characteristic of specific states/behaviors e.g. stages of sleep (high temporal, low
spatial)
What is an MRI? - Answer-Magnetic imaging equipment that uses a radio frequency
pulse to create an image.
What does fMRI measure? - Answer-It detects an increase in blood flow to a brain area
immediately after an increase in brain activity, and it also detects a slightly slower
increase in the percentage of hemoglobin lacking oxygen
What did Hodgkin and Huxley prove? - Answer-Action potential exceeds 0mV
What is sensitization? - Answer-an increase in behavioral response after exposure to a
stimulus
How do neurons learn? - Answer-Through the creation, elimination, or modification of
connections between neurons.
Electrical and chemical signals.
What is neurodegeneration? - Answer-progressive loss of structure/function of neurons
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