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PNB 2264 EXAM 3 2026 QUESTIONS
AND ANSWERS | A+ GRADED | WITH
EXPERT SOLUTIONS
neuroglia - ANSWER-supporting cells in the CNS
astrocytes - ANSWER-neuroglia; surround capillaries and
induce the blood brain barrier; surround synthases and
regulated extracellular K+; responsible for neurotransmitter
uptake
microglia - ANSWER-neuroglia; derived from blood cells; injury
response - secrete inflammatory chemicals; remove cellular
debris by phagocytosis
ependymal cells - ANSWER-neuroglia; line ventricular surface;
secrete cerebrospinal fluid (CSF)
oligodendrocytes - ANSWER-form CNS myelin
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brainstem - ANSWER-consists of the medulla, pons, and
midbrain
brainstem - ANSWER-part of the brain responsible for rigidly
programmed, automatic behaviors; most primitive section; vital
functions
medulla - ANSWER-part of the brainstem; centers for
cardiovascular and respiratory regulation; cranial nerve nuclei;
reticular formation
pons - ANSWER-part of the brainstem; cranial nerve nuclei and
tracts; reticular formation
midbrain - ANSWER-part of the brainstem; responsible for
superior and inferior colliculus; has tracts and nuclei; reticular
formation
superior colliculus - ANSWER-part of the midbrain; responsible
for automatic head and eye movements
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inferior colliculus - ANSWER-part of the midbrain; responsible
for orientation to sound
reticular formation - ANSWER-greater than 100 nuclei; extends
throughout the brainstem; recieves information from all over the
brain; projects throughout the brain
cerebellum - ANSWER-recessives visual, vestibular,
proprioceptive input; functions in skeletal muscle activity,
timing, intensity, and general coordination of contractions of
individual muscles
spinocerebellar tracts - ANSWER-ascending sensory tracts;
mediated unconscious proprioception
diencephalon - ANSWER-includes the thalamus and
hypothalamus; superior to the brainstem
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thalamus - ANSWER-part of the diencephalon; sensory relay
center; every sensory neuron synapses here; many nuclei
hypothalamus - ANSWER-part of the diencephalon;
homeostasis; autonomic functions; longer term maintenance
frontal lobe - ANSWER-part of the cortex; motor, speech,
personality, emotion
parietal lobe - ANSWER-part of the cortex; somatosensory,
voluntary movement
occipital lobe - ANSWER-part of the cortex; vision
temporal lobe - ANSWER-part of the cortex; hearing, balance,
visual processing; also memory
projection fibers - ANSWER-white fiber tracts that are going
somewhere
PNB 2264 EXAM 3 2026 QUESTIONS
AND ANSWERS | A+ GRADED | WITH
EXPERT SOLUTIONS
neuroglia - ANSWER-supporting cells in the CNS
astrocytes - ANSWER-neuroglia; surround capillaries and
induce the blood brain barrier; surround synthases and
regulated extracellular K+; responsible for neurotransmitter
uptake
microglia - ANSWER-neuroglia; derived from blood cells; injury
response - secrete inflammatory chemicals; remove cellular
debris by phagocytosis
ependymal cells - ANSWER-neuroglia; line ventricular surface;
secrete cerebrospinal fluid (CSF)
oligodendrocytes - ANSWER-form CNS myelin
, Page | 2
brainstem - ANSWER-consists of the medulla, pons, and
midbrain
brainstem - ANSWER-part of the brain responsible for rigidly
programmed, automatic behaviors; most primitive section; vital
functions
medulla - ANSWER-part of the brainstem; centers for
cardiovascular and respiratory regulation; cranial nerve nuclei;
reticular formation
pons - ANSWER-part of the brainstem; cranial nerve nuclei and
tracts; reticular formation
midbrain - ANSWER-part of the brainstem; responsible for
superior and inferior colliculus; has tracts and nuclei; reticular
formation
superior colliculus - ANSWER-part of the midbrain; responsible
for automatic head and eye movements
, Page | 3
inferior colliculus - ANSWER-part of the midbrain; responsible
for orientation to sound
reticular formation - ANSWER-greater than 100 nuclei; extends
throughout the brainstem; recieves information from all over the
brain; projects throughout the brain
cerebellum - ANSWER-recessives visual, vestibular,
proprioceptive input; functions in skeletal muscle activity,
timing, intensity, and general coordination of contractions of
individual muscles
spinocerebellar tracts - ANSWER-ascending sensory tracts;
mediated unconscious proprioception
diencephalon - ANSWER-includes the thalamus and
hypothalamus; superior to the brainstem
, Page | 4
thalamus - ANSWER-part of the diencephalon; sensory relay
center; every sensory neuron synapses here; many nuclei
hypothalamus - ANSWER-part of the diencephalon;
homeostasis; autonomic functions; longer term maintenance
frontal lobe - ANSWER-part of the cortex; motor, speech,
personality, emotion
parietal lobe - ANSWER-part of the cortex; somatosensory,
voluntary movement
occipital lobe - ANSWER-part of the cortex; vision
temporal lobe - ANSWER-part of the cortex; hearing, balance,
visual processing; also memory
projection fibers - ANSWER-white fiber tracts that are going
somewhere
