Term
| Three parts to nervous tissue |
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Definition
| Spinal cord, brain and nerves |
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Term
| Functions of the nervous system |
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Definition
-detect changes in the internal/external environment
-evaluate information
-initiate changes in muscular glands |
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Term
| Central Nervous System (CNS) |
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Definition
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Term
| Peripheral Nervous System (PNS) |
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Definition
Outer regions of the nervous tissue
Cranial nerves, spinal nerves, central fibers, peripheral fibers |
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Term
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Definition
originates in the brain
(PNS) |
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Term
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Definition
Originates from the spinal cord
(PNS) |
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Term
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Definition
Extend from the cell body TOWARDS the CNS
(PNS) |
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Term
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Definition
Extend from the cell body AWAY from the CNS
(PNS) |
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Term
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Definition
Incoming information
Sensory
(Afferent/Efferent) |
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Term
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Definition
| Outgoing information (motor) |
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Term
| Somatic Nervous Sytem (SNS) |
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Definition
Somatic sensory division (afferent)
Somatic sensory division (efferent)
(type of nervous system) |
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Term
| Autonomic Nervous System (ANS) |
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Definition
Carry info to the autonomic or visceral effectors (smooth and cardiac muscles and glands)
(Nervous system) |
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Term
| Cells of the nervous system |
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Definition
Neurons: Excitable cells that conduct information
Glia: "glue" |
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Term
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Definition
-Nervous tissue cell
-Star-shaped, largest, most numerous
-Cell extensions connect neurons and capillaries
-Transfers nutrients from the blood to the neuron
-Help forms the Blood-Brain Barrier (BBB) |
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Term
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Definition
Helps maintain stable environment for normal brain fuction
Regulates passage of ions
Water, Oxygen, CO2, Glucose and alcohol pass freely
Important for drug research (Parkinsons) |
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Term
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Definition
-Nervous Tissue cell
-Engulf and destroy cellular debris (phagocytosis)
-Enlarge during times of inflammation and degeneration |
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Term
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Definition
-Nervous Tissue cell
-Similar to epithelial cells
-Forms thing sheets and line the fluid-filled cavities of the brain and spinal cord
-Some cells help produce the fluid that fills these cavities (Cerebral Spinal Fluid -- CSF)
-Cilia may be present to circulate fluid |
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Term
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Definition
-Nervous Tissue cell
-Hold nerve fibers together
-Produce *myelin sheaths* in CNS
-Related to Multiple Sclerosis |
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Term
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Definition
-Nervous Tissue cell
-Only in the PNS
Support nerve fibers and form myelin sheaths |
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Term
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Definition
-Nervous Tissue cell
-Sype of Schwann cell that covers a neuron's cell body |
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Term
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Definition
Cell body (soma)
Axon
Dendrites |
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Term
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Definition
-Part of neuron
-Part of Rough ER
-Contain proteins for nerve signal transmission & generation |
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Term
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Definition
-Recieve information
-Branch out from the soma
-Receptors
-Contract impulse toward the soma |
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Term
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Definition
-Information sent away
-Branch out from soma at axon hillock |
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Term
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Definition
-Areas of insulation produced by Schwann cells
-Increases speed of nerve impulse |
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Term
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Definition
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Term
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Definition
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Term
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Definition
| Breaks in myelin sheath between Schwann cells |
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Term
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Definition
| Junction between two neurons or between a neuron and an effector |
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Term
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Definition
-One axon, several dendrites
-Most numerous |
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Term
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Definition
-One axon, one dendrite
-Least numerous
-Retina, inner ear, olfactory pathway |
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Term
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Definition
-Axon is a single process that branches into a central process (toward CNS) and a peripheral protein (toward PNS)
-Dendrites at distal end of peripheral process
-ALWAYS sensory |
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Term
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Definition
| Bundles of parallel neurons held together by fibrous CT in the PNS |
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Term
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Definition
| Bundles of parallel neurons in the CNS |
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