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Cards In This Set
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What are to two key control systems?
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Nervous and Endocrine
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Characteristics of the Nervous System
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Fast-acting control system
reponds to internal and external changes (basis of homeostasis) Activates muscles and glands |
 Fill in the gaps |
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Draw a diagram of the organisation of the nervous system
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 Fill in this image |
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 Fill in the image |
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Draw a nerve cell
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What is the sympathetic function of the nervous system?
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Sympathetic - Fight, Flight, Fright
Remeber as the "e" division = exercise, excitement, emergence and embarrasement |
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What kind of things does the sympathetic divison of the nervous system do?
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Increses heart rate and force of contraction
dilation of airways in lungs decreased digestive acitivity contriction of blood vessels in viscera and skin / dilation of blood vessels in skeletal muscle and heart |
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What is the Parasympathetic Function of the nervous system?
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Resting and digesting
Conserves energy maintains daily necessary body functions Remeber as the "D" division: disgestion, defecation and diuresis |
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How does the parasympathetic division effect the body?
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Decreases heart rate
constriction of airways in lungs increased digestice activity little or no effect on blood vessels |
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What is a nerve cell?
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Neuron = Cells specialised to transmit messages
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What are the major regions of a neuron
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Cell body - nucelus and metabolic center of the cell
Processes - fibers that extend from the cell body Dendrites - conduct impulse toward the cell body Axon - conduct impluses away from the cell body Schwann cells - produce myelin sheaths Nodes of Ranvier - gaps in myelin sheath along the axon |
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Describe the location of the axon.
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Starts at the axon hillock and ends at the axonal terminals
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Where an what is the axon terminal?
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Axon terminal contain vesicles with neurotransmitters and is at the end of an axon. Axon terminals are seperated fro the next neuron by a gap
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