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25 Cards in this Set
- Front
- Back
- 3rd side (hint)
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What are the 3 functions of the Nervous System?
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1) to detect changes and feel sensations
2)initiate appropriate response to change 3)organize info for immediate use and storage |
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The Nervous System is one of two kinds of systems?
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Regulating(Endocrine is the other)
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It has two divisions?
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The CNS and the PNS
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What does the CNS consist of?
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It consists of the brain and spinal cord, it corresponds to the skeletal axial skull and vertebrae.
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What does the PNS do and consist of?
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It consists of cranial nerves and spinal nerves, includes the Autonomic system(secondary/internal organs/visceral mtor neurons, relays info to the CNS, and the brain is ctr of activity that integrates this info, initiates response, and makes "US", us
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Cell Body
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contains a nucleus in them
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What are nerve cells called?
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Neurons or Nerve Fibers
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whatever their specific functions they all have the same body(physical parts)
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In what system can cells regenerate?
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Peripheral Nervous System
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In what system can cells NOT regenerate?
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Central Nervous system
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What is the Cell Body?
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COntains the nucleusand is essential for cont. life of the neuron. In the NS and the trunk of the body mostly, are for cont. cell life not regeneration.
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What are Dendrites?
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are processes(extensions) that transmit toward the cell body(recieve and send) then sent to the Axon.
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One-Way
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What is the Axon?
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The one ____ of a neuron transmits impulses away from the cell body, releases neurotransmitters to the next cell.
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It is the cell membrane of the Dendrites, cell body, and ___ that carries the electrical nerve impulse.
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In the PNS, AXONS, and Dendrites wrapped in and what do they do?
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They are "wrapped" in specialized cells called Schwann Cells.
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Similar to the Myelin Sheath.
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What is the Myelin Sheath and what does it do?
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Are the layers, myelin is a phospholipid that electrically insulates neurons from one another.
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Without this neurons would "short-circuit" like electical wires....
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The Nodes of Ranvier(neurofibril nodes)
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Are spaces adjacent to Schwann Cells or segments of the myelin sheath.
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These nodes are the parts of the neuron cell membrane that Deploraize when an electrical impulse is transmitted. Only place where this occurs in the PNS.
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What are Dendrites?
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are processes(extensions) that transmit toward the cell body(recieve and send) then sent to the Axon.
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One-Way
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What is the Axon?
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The one ____ of a neuron transmits impulses away from the cell body, releases neurotransmitters to the next cell.
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It is the cell membrane of the Dendrites, cell body, and ___ that carries the electrical nerve impulse.
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In the PNS, AXONS, and Dendrites wrapped in and what do they do?
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They are "wrapped" in specialized cells called Schwann Cells.
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Similar to the Myelin Sheath.
|
|
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What is the Myelin Sheath and what does it do?
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Are the layers, myelin is a phospholipid that electrically insulates neurons from one another.
|
Without this neurons would "short-circuit" like electical wires....
|
|
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The Nodes of Ranvier(neurofibril nodes)
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Are spaces adjacent to Schwann Cells or segments of the myelin sheath.
|
These nodes are the parts of the neuron cell membrane that Deploraize when an electrical impulse is transmitted. Only place where this occurs in the PNS.
|
|
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What are the 3 functions of the Nervous System?
|
1) to detect changes and feel sensations
2)initiate appropriate response to change 3)organize info for immediate use and storage |
|
|
|
The Nervous System is one of two kinds of systems?
|
Regulating(Endocrine is the other)
|
|
|
|
It has two divisions?
|
The CNS and the PNS
|
|
|
|
What does the CNS consist of?
|
It consists of the brain and spinal cord, it corresponds to the skeletal axial skull and vertebrae.
|
|
|
|
What does the PNS do and consist of?
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It consists of cranial nerves and spinal nerves, includes the Autonomic system(secondary/internal organs/visceral mtor neurons, relays info to the CNS, and the brain is ctr of activity that integrates this info, initiates response, and makes "US", us
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