Term
| (CNS) CENTRAL NERVOUS SYSTEM |
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Definition
| THE CENTRAL NERVOUS SYSTEM CONSIST OF ONLY THE BRAIN AND SPINAL CORD |
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Term
| (PNS) PERIPHERAL NERVOUS SYSTEM |
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Definition
| THE PERIPHERAL NERVOUS SYSTEM IS ANYTHING BEYOND THE BRAIN OR THE SPINAL CORD |
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Term
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Definition
| THE INFORMATON GATHERED BY NEURONS IS CALLED SENSORY INPUT IT IS THEN INTERGRATED TO DICED WHAT SHOULD BE DONE WITH IT AND THEN SET OUT OFTEN TO A MOTOR OUTPUT ,GLANDS ECT |
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Term
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Definition
| THE AFFERENT DIVISION OF THE PNS IS THE PART OF THE PNS THAT CARRYS IMFORATION TO THE BRAIN |
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Term
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Definition
| THE EFFERENT DIVISION OF THE PNS IS THE PART OF THE NERVOUS SYSTEM THAT CARRYS IMFORMATION AWAY FROM THE BRAIN TO MOTOR OUTPUTS, GLANDS, ECT |
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Term
| SOMATIC NERVOUS SYSTEM (SNS) |
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Definition
| THE SOMATIC NERVOUS SYSTEM IS COMPOSED OF MOTOR NERVE FIBORS (AXONS) THAT CONDUCT IMPULSES FROM THE CNS TO SKELETAL MUSCLESTHIS IS ALSO REFERED TO AS THE VOLUTARY NERVOUS SYSTEM |
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Term
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Definition
| THE AUTONOMIC NERVOUS SYSTEM CONSISTS OF VISCERAL MOTOR NERVES THAT REGULATE ACTIVITY OF SMOOTH MUSCLES, CARDIAC MUSCLES, AND GLANDS BECAUSE WE HAVE VERY LITTLE CONTROL OVER THESE FUNCTIONS IT IS ALSO CALLED THE INVOLUNTARY NERVOUS SYSTEM |
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Term
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Definition
| NEURONS ARE THE EXCITABLE CELLS OF THE NERVOUS SYSTEM . BUT BECAUSE THEY ARE SO HIGHLY SPECIALIZED THEY HAVE GIVEN UP MANY FUNCTIONS OTHER CELLS PREFORM AFTER A PERSON HAS FINISHED GROWING THESE CELLS CAN NO LONGER DEVIDE SO ONCE THEY ARE DESTROYED THEY CAN NOT BE RESTORED |
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Term
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Definition
| NEUROGLIA CELLS ARE THE WORKERS IN NERVE TISSUE THEY DO ALL THE SUPPORT AND FEEDING TAKING OUT THE GARBAGE AND PROTECTING THAT NERVE TISSUE NEEDS |
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Term
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Definition
| ASTROCYTES ARE ONE OF THE SUPPORTER CELLS FOR NERVE TISSSUE THEY ARE A NEUROGLIA CELL THEY HAVE MANY SMALL PROCESSES THAT ATTACH TO AND SUPPORT THE NEURONS THEY HAVE A STAR LIKE APPEREANCE HENCE THE NAME THEY ATTACH THEMSELVES TO THE BODIES OF THE NEURONS AND CAPILARIES , THEY ALSO HELP CONTROL THE CHEMICAL ENVIROMENT AROUND THE NEURONS AS WELL |
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Term
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Definition
| MICROGLIA ARE ALSO NEURGLIA CELLS THESE ARE THE DEFENDERS OF THE NERVE TISSUE THEY CONTROL THE ENVIREMENT AND GET RID OF BACTIREA DEAD MATERAL ECT BY PHAGOCYTOUSIS (SP) AND ARE THE IMMUNE CELLS OF NERVE TISSUE |
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Term
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Definition
| EPENDYMAL CELLS ARE ALSO NEUROGLIA THEY ARE EPETHIAL CELLS ( LINES COVERS) THEY RANGE IN SHAPE FROM SQUAMOUS TO COLUMNAR THEY LINE THE CENTRAL CAVITIES OF THE BRAIN AND SPINAL COLUMN THEY ALSO PRODUCE SPINAL FLUID |
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Term
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Definition
| THERE ARE TWO TYPES OF NEUROGLIA FOR THE (PNS) THEY ARE CALLED SCHWANN CELLS AND SATELLITE CELLS |
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Term
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Definition
| THE SATELLITE CELLS OF THE PNS... THEIR FUNCTION IS LARGELY UNKNOWN AT THIS TIME THEIR NAME COMES FROM A RESEMBLANCE TO MOONS AROUND A PLANET |
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Term
| SCHWANN CELLS ( NEURILEMMOCYTES ) |
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Definition
| THE SCHWANN CELLS ARE NEUROGLIA OF THE PNS THEY SURROUND AND FORM MYELIN SHEATHS AROUND THE LARGE NERVE FIBERS IN THE PNS |
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Term
| CHARACTORISTICS OF NEURONS |
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Definition
| 1 THEY HAVE EXTREME LONGEVITY GIVEN GOOD NUTRITIONECT 2 THEY ARE AMITOTIC THEY CAN NO LONGER DEVIDE THAT IS WHY THEY ARE SO LONG LIVED 3 THEY HAVE AN EXCEPTIONALLY HIGH METABOLIC RATE THEY NEED CONSTANT SUPPLIES OF FOOD AND OXYGEN NEURONS CAN NOT SURVIVE FOR MORE THAN A FEW MINUTES WITHOUT OXYGEN |
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Term
| NEURON CELL BODY A.K.A. PERIKARYON |
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Definition
| THIS IS THE CENTER OF THE NEURON IT HAS A TRANSPARENT SPERICAL NEUCLEOLUS SURROUNED BY CYTOPLASM THIS IS ALSO REFERED TO AS THE SOMA (BODY) |
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Term
| NISAL BODIES ( CHROMATOPHILIC SUBSTANCE |
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Definition
| THE NISAL BODY IS THE NEURON CELL BODY'S PROTEIN AND MEMBRANE MAKING MACHINERY CONSISTING OF CLUSTERED FREE RIBOSOMES AND ROUGH ENDOPLASMIC RETICULM (ER) THIS IS THE MOST ACTIVE AND BEST DEVELOPED PART OF THE BODY OF THE CELL |
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Term
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Definition
| NEUROFIBRILS ARE BUNDLES OF INTERMEDIATE FILAMENTS WHICH ARE IMPORTANT IN MAINTAINING CELL SHAPE AND INTEGRITY , THEY FORM A NETWORK THROUGHOUT THE THE CELL BODY |
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Term
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Definition
| PROCESSES ARE PROJECTIONS FROM THE CELL BODY DENDRITES ARE NEURON PROCESSES |
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Term
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Definition
| BUNDLES OF NEURON PROCESSES IN THE CNS ARE REFERED AS TRACTS THESE SAME BUNDLES IN THE PNS ARE CALLED NERVES |
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Term
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Definition
| THE DENDRITES OF THE NEURON ARE THE RECEIVING END OF THE STIMULI THEY ARE USUALLY SHORT AND DIFFUSELY BRANCHING EXTENTIONS . VIRTUALLY ALL ORGANELLS PRESENT IN THE NERVE BODY ALSO ACCOR IN THE DENDRITES ( THE DENDRITES ARE THE MAIN RECEPTIVE OR INPUT REGIONS . |
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Term
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Definition
| THE AXON IS THE OUTPUT DEVICE OF THE NEURON THE INTIAL REGIOGN THAT THE AXON ARISES FROM A CONE -SHAPED AREA OF THE CELL BODY CALLED THE AXON HILLOCK IN SO,ME NEURONS THE AXON IS VERY SHORT IN LARGER MUSCLES ECT THE AXON CAN BE UP TO THREE FEET LONG |
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Term
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Definition
| THE AXON HILLOCK IS THE AREA OF THE NEURON BODY WHERE THE AXON ARISES THIS AREA IS ALSO CALLED THE TRIGGER AREA SINCE THIS WHERE THE NERVE IMPULSE IS GENERATED |
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Term
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Definition
| ANY LONG AXON IS ALSO CALLED A NERVE FIBER |
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Term
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Definition
| AXON COLLATERALS ARE PLACES WHERE THE AXON BRANCHS OFF AT IT'S END WHERE IT COMMUNICATES WITH OTHER NEURONS |
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Term
| TERMINAL BRANCHES OR TELODENDRIA |
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Definition
| TERMIANL BRANCHES OR TELODENDRIA ARE THE NAMES FOR THE LITTLE BRANCHES OFF THE AXONS |
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Term
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Definition
| THE SECRETORY REGION OF THE AXON IS THE AREA WHERE THE VISICLES THAT STORE NEUROTRANSMITTERS ATTACH THEMSELVES TO RELEASE THEIR CONTENTS THROUGH ECTOSYTOSIS (SP) |
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