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21 Cards in this Set
- Front
- Back
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Afferent
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The direction of neuronal impulse from the body toward the central nervous system (CNS).
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Autonomic
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Self-controlling or involuntary.
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Autonomic nervous system (ANS)
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Division of the nervous system that controls the involuntary body functions; consists of sympathetic and parasympathetic divisions.
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Axon
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The part of a nerve cell that conducts impulses away from a cell body.
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Blood-brain barrier
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A barrier formed by special characteristics of capillaries to prevent certain chemicals from moving to the brain.
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Cell body
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The main part of a neuron from which axons and dendrites extend.
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Central nervous system (CNS)
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Brain and spinal cord.
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Cerebrospinal fluid (CSF)
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A fluid that fills the ventricles of the brain and also lies in the space between the arachnoid layer of the meninges and the brain or spinal cord.
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Cervical
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The neck region.
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Dendrites
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The part of a neuron that branches out to bring impulses to the cell body.
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Efferent
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The conduction of electrical impulses away from the CNS to the body.
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Homeostasis
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The equilibrium pertaining to the balance of the body with respect to fluid levels, pH level, and chamicals.
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Lumbar
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The region of the back that includes the area between the ribs and the pelvis: the area around the waist.
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Monoamine oxidase (MAO)
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An enzyme (includes MAO-A and MAO-B) found in the nerve terminals, the neurons, and liver cells; inactivates chemicals such as tyramine, catecholamines, serotonin, and certain medications.
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Nerve terminal
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The end portion of the neuron where nerve impulses cause chemical to be released; these cross a small space, called a synaptic cleft, to carry the impulse to another neuron.
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Neuron
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The functional unit of the nervous system, which includes the cell body, dendrites, axon, and terminals.
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Parasympathetic nervous system
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Division of the autonomic nervous system that functions during restful situations; "breed or feed" part of ANS.
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Peripheral nervous system (PNS)
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The division of the nervous system outside the brain and spinal cord.
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Somatic
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The motor neurons that control voluntary actions of the skeletal muscles.
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Sympathetic nervous system
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Division of the autonomic nervous system that functions during stressful
situations; "fight or flight" part of ANC. |
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Thoracic
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Relates to the thorax area or the chest.
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