TEPnervoussystem
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| Neuron | impulse conducting cell. functional unit of the nervous system
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| Soma | cell body; nerve
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| Dendrite | any of the short branched threadlike extensions of a nerve cell, which conduct impulses towards the cell body
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| Synapse | the region of communication between neurons
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| Multipolar neuron | neuron with one axon and three or more dendrites.
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| Bipolar neuron | neuron that has two processes arising from opposite poles of the cell body
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| Unipolar neuron | cell body that emits a single axonal process
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| Anaxonic neuron | multiple dentrites and no axons
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| Schwann Cell | a cell that forms spiral layers around a myelinated nerve fiber
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| Myelin sheath | insulating covering that surrounds an axon with multiple spiral layers of myelin
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| Electrical potential | the potential energy of a positive unit.
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| Current | a flow of electric charge
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| Polarized | fewer positive ions sitting on the inner face of the neuron’s plasma membrane than there are on its outer face in the tissue fluid that surrounds it
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| Neurotransmitter | transmits nerve impulses across a synapse
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| Dopamine | neurotransmitter in the brain and as an intermediate in the biosynthesis of epinephrine
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| Serotonin | powerful vasoconstrictor and is found especially in the brain
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| Somatic reflex | all reflexes that stimulate the skeletal muscles
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| Visceral reflex | a reflex mediated by autonomic nerves and initiated in the viscera
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| Meninges | The three membranes that enclose the vertebrate brain and spinal cord
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| Dura mater | tough fibrous membrane that envelops the spinal cord and brain.
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| Gray matter | The gray area of the central nervous system; contains
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| White matter | White substance of the central nervous system; the myelinated nerve fibers.
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| Cerebrum | the largest part of the brain; consists of right and left cerebral hemispheres
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| Cerebellum | part of the hindbrain; involved in producing smoothly coordinated skeletal muscle activity
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| Gyrus | an outward fold of the surface of the cerebral cortex
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| Sulcus | a furrow on the brain, less deep than a fissure
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| Brainstem | the portion of the brain consisting of the medulla, pons and midbrain
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| Cortex | the outer suface layer of an organ
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| Blood-brain barrier | a mechanism that inhibits passage of materials from the blood into brain tisues
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| Medulla oblongata | the lowest or hindmost part of the brain, continuous with the spinal cord
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| Thalamus | a mass of gray matter in the the diencephalon of the brain
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| Hypothalamus | the region of the diecephalon forming the floor of the third ventricle of the brain
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| Occipital lobe | lobe in the back of the brain. contains the visual area
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| Parietal lobe | middle area of the brain contains the somatic sensory area
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| Frontal lobe | in the front of the brain.
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Created by:
Tessa Elise
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