Kin Unit 5 Lesson 1 and 2
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23 Terms
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The Central Nervous System
The main pathway fro information connecting the brain and peripheral nervous system
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Peripheral Nervous System
Carries information to and from the CNS through nerves
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Automatic nervous system
regulates for the involuntary movements of the cardiac muscles and the smooth muscles of the internal organs
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The Sympathetic Nervous System
- a part of the ANS
- responsible for involuntary responses
- such as the fight or flight response or sweating when nervous
- responsible for involuntary responses
- such as the fight or flight response or sweating when nervous
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Parasympathetic Nervous System
- apart of the ANS
- adjusts the body back to resting state after being altered by the sympathetic system
- adjusts the body back to resting state after being altered by the sympathetic system
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The Somatic Nervous System
- controls skeletal muscles
- has both afferent and efferent nerve fibres
- has both afferent and efferent nerve fibres
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Afferent Muscle fibres
- sensory
- sends information to the CNS
- sends information to the CNS
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Efferent Muscle fibres
- motor
- sends instructions to the skeletal muscles
- sends instructions to the skeletal muscles
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Cerebral reflex
From the brain
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Spinal reflex
From the spinal cord
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Autonomic reflexes
- from the smooth and cardiac muscles
- regulate digestion, elimination, ect
- regulate digestion, elimination, ect
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Somatic reflexes
- affects the skeletal muscles
- cause the stretch reflex and withdrawal reflex
- cause the stretch reflex and withdrawal reflex
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Neutrons
Transmit information to one another
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The Reflex Arch
Allows an organism to respond quickly from sensory neutrons
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Sensory Neuron
Afferent Neutron- the neutron that arrives at the interneuron
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Motor Neuron
Efferent Neurons- exits the interneuron
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Proprioceptors
Sensory receptors located in tendons, muscles, joints, and the inner ear
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Muscle Spindle
The means by which muscles constantly and automatically adjust to the demands asked of them
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Synapse
Neuronal junction - the site of transmitting of electric nerve impulses between two nerve cells (neurons)
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Monosyllabic reflexes
A reflex that only contains one space for an action potential to travel between a sensory and motor neutron
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Polysnaptic reflexes
Spinal reflexes - one or more interneurons lie between the primary sensory fibres and the motor neutrons
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Withdrawal reflex
Involves the withdrawal of a body part from a painful stimulus
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The cross extensor reflex
Involves multiple synapse and muscle groups