Galen A&P NU-110 Exam 4 questions with answers

Galen A&P NU-110 Exam 4 |\ |\ |\ |\ |\




questions with answers |\ |\




The Central Nervous System (CNS) - CORRECT ANSWERS
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✔✔Includes the brain and the spinal cord |\ |\ |\ |\ |\ |\




The Peripheral Nervous System (PNS) - CORRECT ANSWERS
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✔✔includes the nerves that connect the Central Nervous system |\ |\ |\ |\ |\ |\ |\ |\ |\


with the rest of the body
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2 parts of nervous tissue - CORRECT ANSWERS ✔✔Glia Cells, and
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neurons.
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Glia cell - CORRECT ANSWERS ✔✔are support cells of the brain
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astrocytes, microglia, oligodendrocytes |\ |\




Astrocytes - CORRECT ANSWERS ✔✔makes the blood brain|\ |\ |\ |\ |\ |\ |\ |\


barrier. Connects to blood vessels and acts as the gate keeper.
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Does allot with metabolism, mostly of medication
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Microglia - CORRECT ANSWERS ✔✔immune cells of the brain.
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Migrate to the area of injury, it covers it and cleans it up. It does
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not have allot of T or B cells.
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,Oligodendrocytes - CORRECT ANSWERS ✔✔secretes allot of |\ |\ |\ |\ |\ |\ |\


myelin. It is important for the neuron. Actually wraps around
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portions of the neuron. |\ |\ |\




Myelin - CORRECT ANSWERS ✔✔increases the speed of the
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neuron. It is the white matter of the brain and the spinal cord.
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Neurons and Glia can grow back - CORRECT ANSWERS ✔✔but
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they grow back very slowly.
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neuron information only travels - CORRECT ANSWERS ✔✔in one
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direction. That way there is no traffic jams or mixed signals.
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Dendrites - CORRECT ANSWERS ✔✔where the information comes
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in to the neuron
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Cell Body - CORRECT ANSWERS ✔✔houses the nucleus and other
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cell structures. Receives signal from the dendrites.
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Axon - CORRECT ANSWERS ✔✔gets information from the cell
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body


Axon Terminals - CORRECT ANSWERS ✔✔Get information from
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the axon. Is where we release all of the neuron transmitters.
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Myelin - CORRECT ANSWERS ✔✔Not all neurons have ______ but
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those that do move information quickly
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, Afferent Neurons - CORRECT ANSWERS ✔✔are sensory neurons.
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Carries information to the Central nervous system.
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Interneurons - CORRECT ANSWERS ✔✔makes connections within
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the central nervous system.
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Efferent Neurons. - CORRECT ANSWERS ✔✔Motor neurons. Carry
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information away from the Central nervous system and towards
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the periphery.
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Neurons and Glia are all - CORRECT ANSWERS ✔✔intermingled
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together


Action Potential or Nerve impulse - CORRECT ANSWERS ✔✔is the
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electrical signal. Can only happen in the neuron
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Neuron can only be in one of 3 states - CORRECT ANSWERS
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✔✔Polarization, Depolarization, Repolarization |\ |\




Polarization State. - CORRECT ANSWERS ✔✔is the resting State.
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The inside is more negative. Potassium is being moved out. and
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the inside of the cell becomes more negative.
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Depolarization - CORRECT ANSWERS ✔✔Is a stimulated neuron.|\ |\ |\ |\ |\ |\ |\ |\


The inside of the cell becomes more positive. There is allot of
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Sodium to come into the cell.
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