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25 Cards in this Set

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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?
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
Cell Body
contains a nucleus in them
What are nerve cells called?
Neurons or Nerve Fibers
whatever their specific functions they all have the same body(physical parts)
In what system can cells regenerate?
Peripheral Nervous System
In what system can cells NOT regenerate?
Central Nervous system
What is the Cell Body?
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.
What are Dendrites?
are processes(extensions) that transmit toward the cell body(recieve and send) then sent to the Axon.
One-Way
What is the Axon?
The one ____ of a neuron transmits impulses away from the cell body, releases neurotransmitters to the next cell.
It is the cell membrane of the Dendrites, cell body, and ___ that carries the electrical nerve impulse.
In the PNS, AXONS, and Dendrites wrapped in and what do they do?
They are "wrapped" in specialized cells called Schwann Cells.
Similar to the Myelin Sheath.
What is the Myelin Sheath and what does it do?
Are the layers, myelin is a phospholipid that electrically insulates neurons from one another.
Without this neurons would "short-circuit" like electical wires....
The Nodes of Ranvier(neurofibril nodes)
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.
What are Dendrites?
are processes(extensions) that transmit toward the cell body(recieve and send) then sent to the Axon.
One-Way
What is the Axon?
The one ____ of a neuron transmits impulses away from the cell body, releases neurotransmitters to the next cell.
It is the cell membrane of the Dendrites, cell body, and ___ that carries the electrical nerve impulse.
In the PNS, AXONS, and Dendrites wrapped in and what do they do?
They are "wrapped" in specialized cells called Schwann Cells.
Similar to the Myelin Sheath.
What is the Myelin Sheath and what does it do?
Are the layers, myelin is a phospholipid that electrically insulates neurons from one another.
Without this neurons would "short-circuit" like electical wires....
The Nodes of Ranvier(neurofibril nodes)
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.
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?
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