PNB 2274 Exam 3 - Chem exam with complete solutions
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Course
PNB 2274
Institution
PNB 2274
Which ascending tract of the spinal cord carries the sensations for fine touch and vibration to the brain?
medial and lateral pathways
anterolateral pathway
posterior column pathway
corticospinal pathway
posterior column pathway
The primary somatosensory cortex is part of the
Front...
Which is NOT a function of the blood-brain barrier?
It prevents brain neurons from being exposed to drugs
,It protects brain neurons from exposure to abnormal ion levels
It prevents nicotine and alcohol from entering brain interstitial fluid
It protects brain neurons from exposure to abnormal hormone levels
It prevents brain neurons from being exposed to waste products in the blood -
ANSWER-It prevents nicotine and alcohol from entering brain interstitial fluid
these are fat soluble substances that cross BBB through passive diffusion
how are glucose and amino acids transported across the BBB? - ANSWER-active
transport
how does penicillin cross the BBB? - ANSWER-water soluble substance which has
difficulty getting through
Which of the cerebral lobes is the center for personality, hypothesis generation, verbal
communication, and the voluntary control of skeletal muscles?
temporal
parietal
occipital
frontal - ANSWER-frontal
A neurovascular unit includes (choose all that apply)
Endothelial cells
Pericytes
Microglials
Astrocytes
Interneurons - ANSWER-Endothelial cells
,Pericytes
Microglials
Astrocytes
Interneurons
Cerebrospinal fluid is produced by the - ANSWER-choroid plexus
The concentration of K+ in cerebrospinal fluid is _________ the blood.
the same as
lower than
higher than - ANSWER-lower than
If one's blood brain barrier (BBB) is compromised,
ion concentrations in brain interstitial fluid will be altered.
brain blood flow will increase.
other mechanisms like CSF will protect the brain.
there will be no affect to brain functions. - ANSWER-ion concentrations in brain
interstitial fluid will be altered.
Which is NOT a function of cerebrospinal fluid?
CSF transports nutrients and chemicals to the brain.
CSF helps to reduce the effective weight of the brain.
CSF helps to remove waste products from the brain.
CSF helps to promote mitosis within neuronal tissue.
, CSF provides a liquid cushion to protect the brain from sudden movements - ANSWER-
CSF helps to promote mitosis within neuronal tissue.
Transection at the corpus callosum will result in losing ability to
touch nose with eyes closed
control limb muscles
verbally identify an object placed in your right hand without looking
write down the name of an object in your right visual world using your right hand
None of the above. - ANSWER-None
The mixed cranial nerve that projects to and from internal organs, muscles, and glands
is the ________ nerve.
trochlear
(spinal) accessory
trigeminal
vagus
glossopharyngeal - ANSWER-vagus
Which of the following statements are true about cranial nerve IX (cranial nerve 9)?
(Choose all that apply)
It innervates the posterior part of the tongue and transmit sensory information, for
example, temperature, pain, and taste.
It is called glossopharyngeal nerve.
It receives information about blood pH from carotid body.
Damage to cranial nerve IX may experience dry mouth. - ANSWER-all
Which statement regarding the hypothalamus is FALSE?
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