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17 Cards in this Set
- Front
- Back
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Components of CNS
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Brain & Spinal Chord
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Types of Stimuli Receptors
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Sensory
Visceral |
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Components of PNS
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Nerves that transmits impulses to/from CNS
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The Nervous system . . .
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The Nervous system . . . receives, processes, and transmits information in the form of neural signals
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Motor neurons of the somatic nervous system innervate ________
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Motor neurons of the somatic nervous system innervate _skeletal muscle_
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Motor neurons of the autonomic nervous system innervate . . .
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Motor neurons of the autonomic nervous system innervate . . . smooth muscle, cardiac muscle & glands
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The CNS is divided into these two nervous systems
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Somatic
Autonomic |
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The Autonomic Nervous System is subdivided into . . .
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The Autonomic Nervous System is subdivided into . . . a sympathetic division and a parasympathetic division
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The Parasympathetic division of the autonomic nervous system controls . . .
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Rest & Digest
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The Sympathetic division of the autonomic nervous system controls . . .
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Fight or Flight
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Benefits of Myelin Sheath
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1. Increases speed of impulses
2. Reduces energy expenditure of transmission |
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Since Sodium and Potassium ions are both _____ charged, the sodium-potassium pump ______ an excess of ______ charges from the interior of the cell the that the inside of the nerve fiber becomes ______ charges with respect to the outside
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Since Sodium and Potassium ions are both _positively_ charged, the sodium-potassium pump _removes_ an excess of _positive_ charges from the interior of the cell the that the inside of the nerve fiber becomes _negatively_ charges with respect to the outside
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The Nernst Equation - def'n
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Used to calculate the voltage gradient that is needed to counterbalance a concentration gradient
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The Nernst Equation - formula
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E = -60 log [Cin]/[Cout]
Energy = -60 * log of (inside concentration) divided by (outside concentration) |
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Depolarization of a nerve cell is caused by:
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Depolarization of a nerve cell is caused by: a brief opening of sodium channels that allow sodium ions to flow rapidly down their concentration gradient, into the cell.
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Repolarization of a nerve cell is caused by:
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Repolarization of a nerve cell is caused by: a closing of sodium channels and the opening of potassium channels that allow potassium to diffuse out of the cell, down their concentration gradient.
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The speed of an action potential is determined by the ____ and ___ of the nerve fiber
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The speed of an action potential is determined by the _diameter_ and _myelanation_ of the nerve fiber
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