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48 Cards in this Set

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These cards are all words followed by definitions. So you probably want to hit the "Study other side first" option below
intro
central nervous system (CNS)
composed of brain and spinal cord
peripheral nervous system
divided into a sensory system and a motor system
afferent system
carries sensory information from receptors toward the CNS
efferent system
carries motor information away from the CNS towards muscles and glands
neuron
nerve cell
cell body
main part of neuron, contains the cell nucleus
dendrites
transmit impulses to the cell body, several in a neuron
axon
transmits impulses away from the cell body, only one per neuron
myelin sheath
surrounds the axon
myelinated axon
axon surrounded by myelin sheath
white matter
synonym for myelinated axon
gray matter
synonym for non-myelinated axon
node of Ranvier
interruption in the myelin sheath, improves impulse speed
synapse
region of communication between one neuron and another
synaptic bulb
termination of an axon
neurotransmitter
chemical that transmits a nervous impulse (either inhibits or enhances a reaction)
meninges
membranes that protect the brain and spinal cord
dura mater
outer meningeal layer
arachnoid
middle, spider-like meningeal layer
pia mater
inner meningeal layer
cerebrum
largest and uppermost portion of brain
frontal lobe
front lobe of cerebrum, associated with intellect, personality, emotion
temporal lobe
lobe of cerebrum in front of ears, associated with hearing and smell
occipital lobe
lobe at the back of the cerebrum, associated with vision
parietal lobe
located in the top mid-section of cerebrum, associated with language, sensation
insula lobe
located deep inside the cerebrum
diencephalon
located between the cerebrum and the brain stem
thalamus
upper part of dienchapalon
hypothalamus
lower part of diencephalon
brain stem
located below the diencephalon and above the spinal cord
midbrain
upper portion of brain stem
pons
middle portion of brain stem
medulla (oblongata)
lowest part of brain stem, joins with spinal cord
cerebellum
located below the cerebrum and posterior to the brain stem
ventricles
four cavities in brain responsible for forming cerebrospinal fluid (CSF)
cervical nerves
the first eight nerve pairs that branch out from the spinal cord
thoracic nerves
the middle 12 nerve pairs that branch out from the thoracic section spinal cord
lumbar nerves
the 5 nerve pairs in the lumbar region of the spine
sacral nerves
the 5 nerve pairs in the sacral region of the spine
coccygeal nerve
the single nerve pair in the coccygeal region of the spine
somatic system
nerves connected to skin and muscle involved in concious activities (both sensory [afferent] and motor [efferent] activities)
autonomic system
nerves connected to tissues that are under unconcious motor (efferent) control
visceral system
nerves conected to tissues that provide nonconcious sensory (afferent) information
sympathetic system
part of the autonomic system that increases heart and breathing rates
parasympathetic system
part of autonomic system that decreases heart and breathing rates
receptors
sensory nerve endings that respond to various stimulation
nociceptors
pain receptors