The Nervous System
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Key Terms
Sensory Input: Information gathered by receptors Integration: Process when the brain decides what action should take place Motor Output: Nerve impulse for the actual action to take place Central Nervous System: Brain and Spinal Cord Peripheral Nervous System: Everything else Somatic Nervous System: Voluntary muscles (exception reflexes, ex. leg muscles) Autonomic Nervous System: Involuntary muscles (ex. heart) Satellite Cells: Protective cell, adds support and cushioning Schwann Cells: Form Myelin Sheaths (speed impulse) Cell Body: Body of a neuron, contains nucleus and cytoplasm Dendrites: Receive messages from other neurons Axons: Passes messages to other neurons Neurotransmitters: Chemicals released at the axon terminal, goes through synaptic cleft to start a chemical reaction and pass on the message to the next neuron Synaptic Cleft: Space in between dendrite of one neuron to the axon of the other Myelin Sheaths: Whitish fatty material that speeds up the electrical charge Nodes of Ranvier: Space in between the Myelin Sheaths White Matter: Mostly neurons with Myelin Sheaths Grey Matter: Mostly unmyelinated neurons |
Functions of Nervous System
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