Nervous_system

Nervous_system - NERVOUS SYSTEM NERVOUS SYSTEM COMPONENTS...

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NERVOUS SYSTEM
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NERVOUS SYSTEM COMPONENTS Brain Cranial nerves Spinal cord Spinal nerves Ganglia - cell bodies of neurons outside enteric plexuses Sensory receptors
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NERVOUS SYSTEM ORGANIZATION Central Nervous System - thought, emotion, brain memory spinal cord Peripheral Nervous System (PNS) Somatic (SNS) - voluntary Autonomic (ANS) - involuntary
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Subdivisions of the Nervous System
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AUTONOMIC NERVOUS SYSTEM Sensory Motor - sympathetic - parasympathetic
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Subdivisions of Nervous System
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NERVOUS SYSTEM FUNCTIONS Sensory Integrative Motor Concerned with homeostatic regulation
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NERVOUS TISSUE Neurons - conduct impulses Neuroglia - do not conduct impulses
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NEURON DIVERSITY Sensory (afferent) neurons Transmit information from receptors to the brain or spinal cord (CNS) Interneurons (association neurons) Located in the CNS Motor (efferent) neuron send signals from the CNS to muscles & gland cells (effectors)
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INTERNEURONS (90% of neurons) Located only in the CNS Purkinje cells in cerebellum Renshaw cells in spinal cord Pyramid cells in brain
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NEURON DIVERSITY Multipolar – has several dendrites Bipolar – has one main dendrite & one axon Unipolar - axon & dendrite fuse into a single process Anaxonic – has several dendrites but no axon
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Neuron Diversity
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Nervous_system - NERVOUS SYSTEM NERVOUS SYSTEM COMPONENTS...

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