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