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36 Cards in this Set

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  • Back
afferent nerves(sensory)
receives input from receptors scattered throughout the body
voluntary or efferent nerves
(motor)
sends signals out to voluntary muscles
involuntary or autonomic nerves
controls numerous automated bodily functions
neurons
the basic nerve cell
glia
specialized connective tissue cell
dendrites
consists of one or more branching projections that receives impulses and sends them to the cell body or axon
axons located outside the cns often have a segmented wrapping around them called
myelin
the outer mambrane of a schawnn cell is called
neurilema
astrocyte
larger "star cells" that attach to neurons and small blood vessels bringing them together
two-neuron reflex arcs
consists of one sensory neuron a wich receives impulse, and one motor neuron wich connects with an "effector"
three nuron reflex arcs
have an additional neuron called interneuron wich is located between sensory and motor neurons
synapse
a junction where two neurons meet to pass impulses from one to the other
presynaptic neuron
bring impulse into synpse
postsynaptic neuron
receives the impulse across the synapse
neurotransmitter
chemicals wich neurons communicate
brain stem consists of
medula oblingata(infirior)
pons(next supirior)
midbrain(most supirior)
foramen magnum
large opening at base of skull where medulla rests that controls vital centers
(cardiac, resp., vesselmotor)
diencephalon
two structures located here
hypothalmus
thalmus
"ADH" antidiuretic hormones
(hypothalmus)
hormone produced in the posterior pittuitary gland to regulate balance of water in the body
cva
cerebral vascular accident
now known as brain attack
spinal cord
is aproximaly 17" to 18"
has ascending "sensory"
and descending "motor"
layers of meninges
dura mater, pia mater and arachnoid
"CSF" cerebral spinal fluid
-baths the brain and spinal cord
-forms from the blood circulates and reabsorbed by the blood
hydrocephalus
blockage of the flow circuit that causes water in the brain
tenth cranial nerve that controls functions of the heart, lungs, thoracic and abdominal cavities
-vagus nerve
autonomic nervous system
controls impulse from brain or spinal cord to :
-cardiac muscle tissue
-smooth mscle tissue
-selected glandular tissue
sympathetic nervous system
-consists of selected autonomic motor neurons that terminate in nerve bundles called
ganglia
pre-ganglionic neurons
conduct impulses between spinal cord and ganglia
post-ganglionic neurons
conducts impulses from gaglia to target sites
(norepinephrine triggers it)
target tissues(cardiac muscle,smooth muscle, glandular tissue) are known as
autonomic or visceral effectors
Formation of the cerebrospinal fluid occurs in the
choroid plexus
The limbic system integrates
emotion
Acetylcholine binds to
cholinergic receptors
Nerves that originate from the brain are called
cranial nerves
The white, fatty substance that surrounds an axon is called
myelin
Cells that conduct the impulses are called
neurons