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24 Cards in this Set
- Front
- Back
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Synapes
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> the small gap b/t the terminal buttonsof a neuron and the dendrite or cell body.
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Central Nervous System
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> the Brain & Spinal Cord
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Neuroscience
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> An interdisicplinary field of study directed at understanding the brain & its relation to behavior
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Peripheral Nervous System
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the Network of nerves which links the central nervous system w/the rest of the body.
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Nerons
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> the cell in the nervous system that recieve & tranmit information.
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Dopamine
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> a neurotransmitter that often leads to inhibitory effects; decreased levels have been linked to Parkinson's disease & increase levels that have been linked to schizophrenia.
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Glial cells
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> cells that fill in space b/t neurons, remove waste, or help neurons to communicate efficiently.
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Motor Neurons
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> cells that carry info. away fromthe central nervous system to the muscles and glands the directly produce behavior.
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Interneurons
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> cells that tranfers info. from one neuron to another
> they make no direct contact with the outside world. |
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Sensory Neurons
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> cella that carry enviromental messages toward the spinal cord & brain.
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Resting Potential
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> the tiny electronical charge in place b/t the inside and outsideof the resting neuron.
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Myelin Sheath
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an insulating material that protects the axon and hepls to speed up tranmission.
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Reflexes
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> Largely automatic body reactions ~ such as a knee jerk~ that is controlled primarily by the spinal cord.
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Dendrites
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> the fibers the extend outward from a neuron & recieve info. from the other neurons.
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Terminal buttons
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The tiny swellings at the end of the axon that contain chemicals improtant to neural transmission.
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Soma
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> the body if a neuron.
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Axon
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> thelong tall-like part of a neuron that serves as the cell's transmiter.
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Serotonin
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> a neurotranmitter that has been linked to sleep, dreaming, general arousal, & may also be involved in some psychological disorder such as depression and schizophrenia.
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Action Potential
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> the all-or-none eletrical signal that travels down a neuron'a axon.
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Neurontranmitters
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> chemical messenger that relays info. from one neuron to the next.
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GABA (gamma-amino-butyric acid)
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> a neurotranmitter that may play a role in regulation of axiety; it generally produces inhibitory effects.
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Refractory Period
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> the period of time following an action potential when more action potential cannot be generated.
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Acetylcholine
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> a neurotransmitter that plays multiple roles in the central and peripheral nervous system, including the excitiof the muscle contractions.
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Endorphins
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> Morphinelike chemicals that act as the brain's natural painkillers.
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