Practice test 2 Flashcards
the patellar knee jerk reflex is an example of a
somatic reflex
white and gray rami communicantes connect ___ and _____
spinal nerves
sympathetic ganglia
____ produce myelin sheaths around axons in the central nervous system
oligodendrocytes
the ___ integrates visual info with other sensory input to initiate reflex responses to visual stimuli
superior colliculi
lateral spinothalamic tracts carry sensory info related to
pain and temp
cell bodies of most sensory neurons reside in the
dorsal root ganglia
sensory fibers are organized by
the type of info that they carry touch pain
within a tract, sensory fibers entering more
superiorly reside more laterally
second order neurons typically decussate in the
spinal cord or brain stem
cranial nerves that innervate an extra ocular muscle that moves the eye
abducens, oculomotor, trochlear
each pair of spinal nerves monitars a specific region of the body surface called
dermatome
the visual cortex is located within the ____ of the cerebrum
occipital lobe
lower motor neuron that stimulates muscle fibers in the thigh can be activated by a sensory neuron or by an upper motor neuron this is an example of
convergence
the medulla oblongata deals with
autonomic control of visceral activities
what structure allows cerebrospinal fluid to be recycled back into the bloodstream
arachnoid granulation
motor control of speech is concentrated in ____ which is typically located in the ____ cerebral hemisphere
speech center
left
what part of neuron releases neurotransmitters via exocytosis
axon terminal
hypothalamus controls the bodys water balance through production of
antidiuretic hormone
hypothalamus subconsciously controls motor activity associated with
various emotions
hypothalamus coordinates activities of the
endocrine and nervous systems
hypothalamus helps to regulate
body temp
which of the following is a response associated with the sympathetic nervous system
dilation of the airway
the outermost layer of a peripheral nerve is a tough sheath of fibrous connective tissue called the
epineurium
the primary motor cortex is located in the
precentral gyrus
sensory info conveyed by the spinocerebellar tracts is processed in the
ipsilateral cerebellum
the parasympathetic divison of the autonomic nervous system is characterized by
long preganglionic fibers
the falx cerebri which attaches to the crista galli of the ethmoid, is an extension of the
dura mater
the corpus callosum is composed of
commissural fibers
neurons undergo mitosis to replace old nerual tissue but only do so every
10 years
anaxonic neurons can receive signals from other neurons but they cannot send
signals to themselves
all spinal cord neurons are connected via
gap junctions and communicate without neurotransmitters
which glial cells are involved in maintaing the blood brain barrier
astrocytes
which of the follwoing nerves arise from brachial plexus
radial
axillary
ulnar
median
sensory nerve
CN VIII
most upper motor neurons decussate in the
medulla oblongata
intramural ganglia are associated with the
parasympathetic nervous system
mixed nerves
contain both sensory and motor neurons
around the brain and spinal cord cerebrospinal fluid flows within the
subarachnoid space
als occurs due to the degeneration of
upper and lower motor neurons
motor neurons exit the spinal cord via the
ventral root
major region of adult brain that deveops from the primary brain vesicle known as the prosencephalon
cerebrum/thalamus/hypothalamus
glial cells are ciliated and contribute to the production and circulation of cerebrospinal fluid
ependymal cells
where in the spinal cord are the cell bodies of preganglionic neurons concentrated
lateral horn
nerve plexus gives rise to the sciatic nerve
sacral
regions of the brain that is part of the brain stem
medulla oblongata
pons
midbrain
name or number of cranial nerve that has opthalmic maxillary and mandibular branches
trigeminal V
which region of the brain adjusts postural muscles and helps to fine tune voluntary and involuntary movements
cerebellum
term is used to describe a collection of neuronal cell bodies in the central nervous system
nucleus
tracts convey signals that provide voluntary control of skeletal muscles
corticospinal tracts
cranial nerve gives rise to 90% of the preganglionic fibers in the parasympathetic nervous system
vagus x
what layer of the spinal meninges is firmly bound to the spinal cord and provides the spinal cords blood supply
pia mater
sensory cortex associated with the temporal lobe of the cerebrum
olfactory
auditory
in most sensory tracts, which neurons convey info from the thalamus to the primary somatosensory cortex
third order neuron
cranial nerve that is a motor nerve
oculomotor III
trochlear IV
abducens VI
accessory XI
hypoglossal XII
name given to the collection of spinal nerve roots inferior to the conus medullaris of the spinal cord
cauda equina
