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22 Cards in this Set
- Front
- Back
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Axons generate electricity at what area?
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Axon Hillock
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What is saltatory conduction?
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Electric signal jumps from node to node in between myelin wrappings.
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Electric signal jumps from node to node in between myelin wrappings is called?
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Saltatory conduction
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All-or-none electrical signal propagated along axons is known as the_____ and at what voltage?
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Action Potential
-55volts |
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Neural membrane has what ions?
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Sodium
Potassium Chloride |
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Neuronal cell is more negatively charged that the outside state is called?
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Resting membrane potential
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What plays a critical role in regulating the normal ionic extracellular environment in the CNS?
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Astrocytes
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If the inside of the cell becomes positively charged, the cell is_____, and if the cells become negative_____?
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Depolarized
Hyperpolarized |
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Two amino acid neurotransmitters are?
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Glutamate
Gamma Aminobutyric Acid (GABA) |
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Name an excitatory neurotransmitter.
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Glutamate
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Name an inhibitory neurotransmitter.
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Gamma Aminobutyric Acid (GABA)
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What are the two biogenetic amines (monoamines) in the CNS?
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Cathecholamines (dopamine & norepinephrine)
Indolamine (5-HT or Serotonin) |
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What is acetylcholine?
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A neurotransmitter
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Large molecules and diverse group of molecules that may also act in some cases as hormone.
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Peptides (ex. Enkephalins & Endorphins)
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What does Norepinephrine do and if deficient?
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Controls sleep/wake cycles, mediate fear/anxiety/stress
Drop in levels contributes to mood anxiety |
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What does Seritonin do and if deficient?
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Controls cognition,
Drop in levels contributes to mood & psychotic disorders (inhibition, appetite, pain regulation) |
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What binds to receptors?
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Agonist
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What blocks receptors?
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Antagonist
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What does Acetylcholine do and if deficient?
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Controls learning, memory, mood, sleep, Rem sleep,
Dorp in levels affects CNS (Alzheimer) |
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What does Epinephrine do?
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Adrenaline, controls flight or fight response
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What does norepinephrine do?
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CNS, involved with alertness/wakefulness
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What does Dopamine do?
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Learn, mood, attention, behavior, can be excitatory or exhibitory
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