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Nervous System
terms and definitions
| Question | Answer |
|---|---|
| afferent | the direction of neuronal impulses from the body toward the central nervous system |
| autonomic | self-controlling or involuntary |
| autonomic nervous system | division of the nervous system that controls the involuntary body functions, consists of sympathetic and parasympathetic divisions |
| axon | the part of a nerve cell that conducts impulses away from a cell |
| blood-brain barrier | a barrier formed by special characteristics of capillaries to prevent certain chemicals from moving to the brain |
| cell body | the main part of a neuron from which axons and dendrites extend |
| central nervous system | brain and spinal cord |
| cerebrospinal fluid | a fluid that fills the ventricles of the brain and also lies in the spaces of the brain or spinal cord and the arachnoid layer of the meninges |
| cervical | neck region |
| dendrite | the part of a neuron that branches out to bring impulses to the cell body |
| efferent | the conduction of electrical impulses away from the central nervous system to the body |
| lumbar | the region of the back that includes the area between the ribs and the pelvis: the area around the waist |
| monoamine oxidase | an enzyme found in the nerve terminals, the neurons, and liver cells: it inactivates chemicals such as tyramine, catecholamines, serotonin, and certain medications |
| nerve terminal | the end portion of the newron where nerve impulses cause chemicals to be released: these cross a small space, called a synaptic cleft, to carry the impulse to another nueron |
| neuron | the functional unit of the nervous system, which includes the cell body, dendrites, axon, and terminals |
| parasympathetic nervous system | division of the autonomic nervous system that functions during restful situations: "breed or feed" part of the autonomic nervous system |
| peripheral nervous system | the division of the nervous system outside the brain and spinal cord |
| somatic | the motor nuerons that control voluntary actions of the skeletal muscles |
| sympathetic nervous system | division of the autonomic nervous system that functions during stressful situations: "fight or flight" part of the autonomic nervous system |
| thoracic | relates to the thorax area or the chest |
Created by:
triscianickel
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