Nervous System - Part 1
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Created by:
AshleyJohnson418 on January 30, 2012
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19 terms
Terms | Definitions |
|---|---|
 Nervous System | the sensory and control apparatus consisting of a network of nerve cells |
| Sensory Input | The conduction of signals from sensory receptors to processing centers in the central nervous system |
| Motor Output | The conduction of signals from a processing center in a central nervous system to effector cells |
| Central Nervous System | the portion of the vertebrate nervous system consisting of the brain and spinal cord |
| Peripheral Nervous System | the section of the nervous system lying outside the brain and spinal cord |
| Afferent/Sensory | nerve fiber which carries info towards CNS |
| Efferent/ Motor | carries impulses from CNS to the viscera and/or muscles and glands. |
| Somatic | affecting or characteristic of the body as opposed to the mind or spirit |
| Autonomic Nervous System | the part of the nervous system of vertebrates that controls involuntary actions of the smooth muscles and heart and glands |
| Neuroglia | sustentacular tissue that surrounds and supports neurons in the central nervous system |
| Astrocytes | largest, most numerous glial cells; maintain blood-brain barrier to isolate CNS from general circulation; provide structural support for CNS; regulate ion and nutrient concentrations; perform repairs to stabilize tissue and prevent further injury |
| Microglia | neuroglial tissue of mesodermal origin that can become phagocytic |
| Ependymal | lines the cavities of the brain and spinal cord with cerebrospinal fluid. The cilia help t circulate the cerebrospinal fluid to protect the CNS. |
| Oligodendrocytes | glia cells that surround and insulate certain axons in the vertebrate brain and spinal cord |
| Schwann Cells | Supporting cells of the peripheral nervous system responsible for the formation of myelin. |
| Satellite Cells | surround neuron cell bodies in glanglia; protects and regulates nurtients for cell bodies in ganglia |
| Cell Body | largest part of a typical neuron; contains the nucleus and much of the cytoplasm |
| Dendrites | branching extensions of neuron that receives messages from neighboring neurons |
| Axons | a part of a neuron that carries impulses away from the cell body |
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