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61 terms

test 3

STUDY
PLAY
which of the following is NOT function of astrocytes
PROVIDE THE DEFENSE FOR THE CNS
(control the chem enviro, gurid migratino of young neurons, synapse info, help determine capillary permeability, anochor neurons to blood vessels, support and brace neurons)
waht are ciliated CNS meuroglia that play an active role in moving the cerebrospinal fluid called
epndymal cells
the period after an intial stimulus when a neuron is not sensitive to another stim is the
abosolute refractory period
which of the following is NOT a special characteristics of neurons
THEY ARE MITOTIC
(conduct impulses, have an exceptionally high metabolic rate, extreme longevity)
which ion channel opens in repsonse to a change in membrane pot and participates in teh generaition of conduction of action potentials
voltage gated channels
collection of nerve cell bodies outside the central nervous sytstem are called
ganglia
a neuron that has as its primary function teh job of connecting other neurons is called
internueron
saltatory conduction is made possible by
teh myelin sheath
which of the following is FALSE
A NERVE IMPULSE OCCURS IF THE EXCITATORY AND INHIBITORY EFFECTS ARE EQUAL
an inhibit post synap pot occurs if the inhibit effect is greater than the excit, causing hyperpolarization
an excit post synap pot occurs if the excit effect is greater than the inhibit effect but less than threshold
select the correct statement regarding synapses
teh synap cleft prevents an impuls from being transmitted directly from one neuron to another
neuroglia that control teh chem environ around neurons by buffering potassium and recapturing neurotransmitters are
ASTROCYTES
schwann cells are functionally similar to
oligodendrocytes
immediatley after an act pot has peaked which ion volatage gates open
potassium
an IPSP is associated with
hyperpolarization
which of the following will occur whne and EPSP is being generated on teh dendritic membrane
A SINGE TYPE FO CHANNEL WILL OPEN, PERMITTING SIMULTANEOUS FLOW OF SODIUM AND POTASSIUM
which of the following is NOT true of gradded pot
THEY INCREASE AMPLITUDE AS THEY MOVE AWAY FROM STIM POINT
in what way does the interior surface fo teh cell membrane of resting neuron differ from teh eternal enivron? the interior is ___
negatively charged and contains less sodium
neurons may be classified according to several characteristics. which of the following is correct
group c fibers are not capable of saltatory conduction
neuclei of cranial nerves V VI VII are found in
pons
teh brain stem consists of the
midbrain, medulla, and pons
teh primary auditory coriex is located in the
temporal lobe
spinocerebellar tracts ____
CARRY PROPRIORECEPTOR INPUTS TO THE CEREBELLUM
the vital centers for teh control of heart rate, respiration, and blood pressure are located in teh ____
MEDULLA
cell bodies of the sensory neurons of the spinal nerves are located in the
dorsal root ganglia of the spinal cord
which of the following generalization does NOT describe teh cerebral cortex
THE HEMISPHERES ARE EXACTLY EQUAL IN FUNCTION
no functional area of teh cortex works alone
each hemisphere is chiefly concerned with sensory and motor funcs of the contralateral side
teh cerebral cortex contains three kinds of func areas
which of these would you NOT find in teh cerebral cortex
FIBER TRACTS
unmylinated axons
cell bodies
dendrites
they hypothalamus
is teh thermostat of teh body because it regualtes temperature
out
out
two terms for the massive motor tracts serving voluntary movement are
pyramidal and corticospinal
an individual who could trace a pic of a bike with his or her figer but could nto regonize it as a bike has damage to
bisual association area
brocas area
is considered motor speech area
which part of teh cerebral cortex is involved in itellect, cognitino, recall, personality
prefront cortex
which of the follwing is NOT a part of teh basal nuclei
SUBSTANTIA NIGRA
lentifrom nucleus, globus pallidus, putamen
all of the following are structres of the limbic system EXCEPT
CAUDATE NUCLEUS
amygdalooid nucleus, cingulate gyrus, hippocampus
wihch of the follwing is NOT a midbrain structure
THIRD VENTRICLE
cerebral peduncles, red nucleus, corpora quadrigemina
which of the following is involved with motor activity
RED NUCLEI
second order neurons of bothteh specific and non specficic ascending pathways terminate in teh
thalamus
loss of ability to perform skilled motot activityes such as piano playing, with no paralysis or weakness in muscles, suggests
permotor cortex
a patient is admitted to teh rehab five ddays after a stroke. the nurses assesses muscle strength and determines he has right sided wake ness. what part of brain injured?
left hemi primary motor cortex
which of teh follwing tracts convey vibrationn and toehr specif sensations that can be precisely located
pyramidal tract
too long
too long
too long
too long
the limbic associate of teh multimodal association areas proves our
emortional impact
which of the following occurs during depolar of axon
sodium volage gated channels open
an axons resting membrane pot is maintained by
the NA/K pump
an ex of a structure or substance that moves in an axon in the retrograde direction is
damaged organelles
during the relative refractory period of an act pot, an act pot
can be generated with a strong stim
at teh threshold potential
ALL NA+ VOLTAGE GATED CHANNELS OPEN
to teh post synaptic membrane effects of a neurotranmitter are terminated by all of the follwing EXCEPT
BLOCAGE OF CA ++ VOLTAGE GATED CHANNELS
all of teh follwing descriptions refer to dorsal solumn medial lemniscal pathways EXCEPT
THEY TRANSMIT ITCH SNESATION
consist of large fibers, include a chain of 3 neurons, consist of myelinated fibers
in activation sequence for motor areas, the structure taht decides which set of muscles to contract for required movemtn is teh
primary motor cortex
what is a small deviation in resting membrane protential that causes the membrane potential to become either more or less negative
TEMPORAL POTENTIAL
which of the following is NOT true of graded pot
they increase in freq as tey move away form teh stim
which is true
if teh excit effect is greater than teh inhibitory effect but less than they thershold pot the result is substhreshodl EPSP
somatic motor cortex
FRONTAL LOBE
primary sensory cortex
PARIETAL LOBE
premotor area
insula
taste area
insula
motor speech area
frontal lobe
auditory area
temp lobe
visual cortex
occipital lobe