NERVOUS.SYSTEM-RS
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| dendrites | receives info
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| cell body | nucleus, cytoplasm
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| axon | sends info
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| myelinated | faster, transfers info
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| node of ranvier | action potential
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| unmyelinated | slow production
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| axon terminal | end of axon, stimulus transferred
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| synaptic bulb | end of axon terminal, neuro transmitters are released
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| synaptic cleft | space between bulb and post synaptic membrane
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| neuron carry sensory information towards the CNS | Afferent
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| neuron carry motor information away from the CNS | Efferent
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| synaptic bulb | electrical action potential that goes thru
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| synapse | permits a neuron to pass an electrical or chemical signal to another cell
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| what is a neurotransmitter | a chemical
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| where is the neurotransmitter produced | in the axon
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| where is the neurotransmitter transported | at the axon
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| where is the neurotransmitter released | synaptic bulb
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| acetylcholine | stimulate
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| acetylcholine | muscles, glands or other neurons
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| Histamine | stimulate
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| Histamine | mast cells
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| Epinephrine/norepinephrine | stimulate
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| Epinephrine/norepinephrine | ANS
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| Endorphins/enkephalins | inhibit
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| Endorphins/enkephalins | pain
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| Substance P | stimulate
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| Endorphins/enkephalins | pain
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| what is a nerve | group of neurons
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| epineurium | outercovering
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| perineurium | covers bundles or fasciculus
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| endoneurium | covers each axon
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| how many cranial nerves are there | 12 pair
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| trigeminal | sensory face
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| facial | motor face, movement
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| vagus | stimulates everything (longest one)
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| accessory | sternoclidomastoid and upper trapes
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| how many spinal nerves are there | 31 pair
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| what is a plexus | a network of spinal nerves
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| cervical | upper head, face, neck
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| cervical | phrenic (diaphragm muscle)
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| brachial | upper extremities
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| lumbar | front of lower extremities
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| sacral | posterior lower extremities
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| muscle spindle cells | monitor length of muscle stimulates when contracted
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| golgi tendon organs | monitor muscle tension
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| joint kinesthetic receptors | monitor joint position
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| cutaneous receptors | touch, pressure, temp
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| what is a reciprocal inhibition | cause other muscles to elongate
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| what information do the reflexes tell a practitioner | nerve function
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| what is a dermatome | skin stimulation of a spinal nerve
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| what are neuroglia? | support cells
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| Astrocytes | blood brain barrier
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| ependymal cells | filter cerebral spinal fluid
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| microglia cells | eat and devour, fango cells
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| oligodendrocytes | produce mylin in CNS
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| schwann cells | produce mylin in PNS
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| the very distal end of the spinal cord is called | caudal equina (resemble horse tail)
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| 3 LAYERS OF MENINGES: deuro mater | outer
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| 3 LAYERS OF MENINGES: arachnoid | middle
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| 3 LAYERS OF MENINGES: pro mater | inner
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| what is the purpose of meninges | to protect
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| where is the epidural space | above the deuro mater
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| why is white matter white | mylinated
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| why is gray matter gray | unmylinated
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| what is decussation | the electrical stimulus crossing over the CNS,right side of body messages are received on the left side of brain.
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| what is CSF | fluid surrounds brain and protects and nourishes
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| known as vital reflex center | medulla oblongata
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| what is the reticular activationg system responsible for? | alertness, awakefullness, awareness
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| the limbic system is known as the | emotional brain
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| what main arteries serve the brain? | vertebral and corritited
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| what is the function of the cerebellum | balance muscle control and coordination
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| what is the function of the cerebrum | intelligence, analizing (thinking brain)
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| frontal | motor activity
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| parital | touch, pain, etc
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| temporal | hearing
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| occipital | vision
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Created by:
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