Galen A&P NU-110 Exam 4 with correct |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
answers
The Central Nervous System (CNS) - correct answer✔✔Includes the brain and the spinal cord
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The Peripheral Nervous System (PNS) - correct answer✔✔includes the nerves that connect the
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Central Nervous system with the rest of the body
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2 parts of nervous tissue - correct answer✔✔Glia Cells, and neurons.
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Glia cell - correct answer✔✔are support cells of the brain
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astrocytes, microglia, oligodendrocytes |||\\\ |||\\\
Astrocytes - correct answer✔✔makes the blood brain barrier. Connects to blood vessels and |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
acts as the gate keeper. Does allot with metabolism, mostly of medication
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Microglia - correct answer✔✔immune cells of the brain. Migrate to the area of injury, it covers
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it and cleans it up. It does not have allot of T or B cells.
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Oligodendrocytes - correct answer✔✔secretes allot of myelin. It is important for the neuron. |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
Actually wraps around portions of the neuron. |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
Myelin - correct answer✔✔increases the speed of the neuron. It is the white matter of the
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brain and the spinal cord. |||\\\ |||\\\ |||\\\ |||\\\
Neurons and Glia can grow back - correct answer✔✔but they grow back very slowly.
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,neuron information only travels - correct answer✔✔in one direction. That way there is no
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traffic jams or mixed signals.
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Dendrites - correct answer✔✔where the information comes in to the neuron |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
Cell Body - correct answer✔✔houses the nucleus and other cell structures. Receives signal
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from the dendrites.
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Axon - correct answer✔✔gets information from the cell body
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Axon Terminals - correct answer✔✔Get information from the axon. Is where we release all of
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the neuron transmitters.
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Myelin - correct answer✔✔Not all neurons have ______ but those that do move information
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quickly
Afferent Neurons - correct answer✔✔are sensory neurons. Carries information to the Central
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nervous system. |||\\\
Interneurons - correct answer✔✔makes connections within the central nervous system. |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
Efferent Neurons. - correct answer✔✔Motor neurons. Carry information away from the
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Central nervous system and towards the periphery.
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Neurons and Glia are all - correct answer✔✔intermingled together
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, Action Potential or Nerve impulse - correct answer✔✔is the electrical signal. Can only happen
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in the neuron
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Neuron can only be in one of 3 states - correct answer✔✔Polarization, Depolarization,
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Repolarization
Polarization State. - correct answer✔✔is the resting State. The inside is more negative. |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
Potassium is being moved out. and the inside of the cell becomes more negative. |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
Depolarization - correct answer✔✔Is a stimulated neuron. The inside of the cell becomes |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
more positive. There is allot of Sodium to come into the cell.
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Repolarization - correct answer✔✔returns to resting. Charge goes back to negative inside. |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
Puts all of the ions back to where they are supposed to be. So potassium moves out. Back to
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negative charge on the inside. |||\\\ |||\\\ |||\\\ |||\\\
Refectory Period. - correct answer✔✔Cell is not able to respond to another action potential
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until repolarization is complete and everything is back to where it is supposed to be.
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Make myelin (2 cells) - correct answer✔✔are schwann cells and oligodendrocytes.
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Schwann cell is located in the - correct answer✔✔peripheral nervous system. makes myelin
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In a myelinated nerve - correct answer✔✔the nerve impulse jumps from node to node.
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Saltatory Conduction - correct answer✔✔it is the jumping of the nerve impulse in the
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myelinated nerve. |||\\\
Myelination increases - correct answer✔✔the speed of the nerve impulse. |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
answers
The Central Nervous System (CNS) - correct answer✔✔Includes the brain and the spinal cord
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
The Peripheral Nervous System (PNS) - correct answer✔✔includes the nerves that connect the
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
Central Nervous system with the rest of the body
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
2 parts of nervous tissue - correct answer✔✔Glia Cells, and neurons.
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
Glia cell - correct answer✔✔are support cells of the brain
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
astrocytes, microglia, oligodendrocytes |||\\\ |||\\\
Astrocytes - correct answer✔✔makes the blood brain barrier. Connects to blood vessels and |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
acts as the gate keeper. Does allot with metabolism, mostly of medication
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
Microglia - correct answer✔✔immune cells of the brain. Migrate to the area of injury, it covers
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
it and cleans it up. It does not have allot of T or B cells.
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
Oligodendrocytes - correct answer✔✔secretes allot of myelin. It is important for the neuron. |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
Actually wraps around portions of the neuron. |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
Myelin - correct answer✔✔increases the speed of the neuron. It is the white matter of the
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
brain and the spinal cord. |||\\\ |||\\\ |||\\\ |||\\\
Neurons and Glia can grow back - correct answer✔✔but they grow back very slowly.
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
,neuron information only travels - correct answer✔✔in one direction. That way there is no
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
traffic jams or mixed signals.
|||\\\ |||\\\ |||\\\ |||\\\
Dendrites - correct answer✔✔where the information comes in to the neuron |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
Cell Body - correct answer✔✔houses the nucleus and other cell structures. Receives signal
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
from the dendrites.
|||\\\ |||\\\
Axon - correct answer✔✔gets information from the cell body
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
Axon Terminals - correct answer✔✔Get information from the axon. Is where we release all of
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
the neuron transmitters.
|||\\\ |||\\\
Myelin - correct answer✔✔Not all neurons have ______ but those that do move information
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
quickly
Afferent Neurons - correct answer✔✔are sensory neurons. Carries information to the Central
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
nervous system. |||\\\
Interneurons - correct answer✔✔makes connections within the central nervous system. |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
Efferent Neurons. - correct answer✔✔Motor neurons. Carry information away from the
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
Central nervous system and towards the periphery.
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
Neurons and Glia are all - correct answer✔✔intermingled together
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
, Action Potential or Nerve impulse - correct answer✔✔is the electrical signal. Can only happen
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
in the neuron
|||\\\ |||\\\
Neuron can only be in one of 3 states - correct answer✔✔Polarization, Depolarization,
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
Repolarization
Polarization State. - correct answer✔✔is the resting State. The inside is more negative. |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
Potassium is being moved out. and the inside of the cell becomes more negative. |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
Depolarization - correct answer✔✔Is a stimulated neuron. The inside of the cell becomes |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
more positive. There is allot of Sodium to come into the cell.
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
Repolarization - correct answer✔✔returns to resting. Charge goes back to negative inside. |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
Puts all of the ions back to where they are supposed to be. So potassium moves out. Back to
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
negative charge on the inside. |||\\\ |||\\\ |||\\\ |||\\\
Refectory Period. - correct answer✔✔Cell is not able to respond to another action potential
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
until repolarization is complete and everything is back to where it is supposed to be.
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
Make myelin (2 cells) - correct answer✔✔are schwann cells and oligodendrocytes.
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
Schwann cell is located in the - correct answer✔✔peripheral nervous system. makes myelin
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
In a myelinated nerve - correct answer✔✔the nerve impulse jumps from node to node.
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
Saltatory Conduction - correct answer✔✔it is the jumping of the nerve impulse in the
|||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
myelinated nerve. |||\\\
Myelination increases - correct answer✔✔the speed of the nerve impulse. |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\ |||\\\
