Term
| 3 basic function of nervous system |
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Definition
| sensory, motor, integration |
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Term
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Definition
Central Nervous System Brain + Spinal Cord Integrative and Control Center |
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Term
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Definition
| Peripheral Nervous System
Cranial nerve and spinal nerves
Communication lines between CNS and rest of the body |
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Term
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Definition
| Sensory(afferent) and Motor (efferent) |
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Term
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Definition
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Term
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Definition
| motor nerve fibers
CNS to effectors |
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Term
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Definition
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Term
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Definition
| Autonomic Nervous System
involuntary visceral control
CNS to cardiac/smooth muscle and glands |
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Term
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Definition
| Parasympathetic and Sympathetic |
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Term
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Definition
| voluntary
conduct impulse from CNS to skeletal muscle |
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Term
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Definition
| Conserves E
promotes nonemergency functions |
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Term
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Definition
| mobilizes body system during emergency situations |
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Term
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Definition
| Toward vs Away from Center |
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Term
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Definition
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Term
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Definition
| Individual/couple axon vs Large grouping of axon |
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Term
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Definition
| Neurons and Glial (neuroglial) cells |
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Term
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Definition
| nerve cells
basic structural and functional unit
release NT
Respond to physical and chemical stimuli
Product and conduct electrochemical impulses |
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Term
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Definition
| Supportive cells
regulate ECF
Absorbs NT |
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Term
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Definition
Dendrites Cell body -Nissl bodies (rER) -Axon hillock -Neurofibrils Axon - Collaterals - Telodendria/ Terminal arborization Terminal bulb/knob Myelin -Node of Ranvier/Neurofibral node |
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Term
| 3 structural types of neurons |
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Definition
Unipolar Bipolar Multipolar |
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Term
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Definition
Afferent(sensory)-receptor to CNS
Efferent(motor)-CNS to effector
Association(Interneurons)-confined to CNS
[note: afferent and efferent = PNS] |
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Term
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Definition
| neurolemma warp around axon like toothpaste around pencil
Neurofibral nodes (nodes of Ranvier)-interruptions btw Schwann cells |
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Term
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Definition
| oligodendrocytes cover multiple axon
more efficient |
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Term
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Definition
| destruction of oligodendrocytes |
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Term
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Definition
| Schwann wrap around multiple axon to save space and to condense |
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Term
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Definition
| In PNS
Limited to absence of BM and brain inhibition of nerve growth
Restricted to time constraint
myelination helps regeneration of severed axons |
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Term
| Steps to Nerve Regeneration |
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Definition
1. Chromatolysis 2. Wallerian Degeneration 3. Retrograde degeneration to 1st node past injury 4. Regeneration of tube left by Schwann cells 5. Axon regeneration/ Muscle fiber regrowth (hypertrophy) |
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Term
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Definition
| disintegration of the Nissl bodies of a neuron as a result of injury, fatigue or exhaustion |
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Term
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Definition
degeneration of distal end fo injury associated with inflammation and macrophages |
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Term
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Definition
outer nucleated cytoplasmic layer (Sheath of Schwann) |
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