PNB 2274 EXAM 3 Review - Dr. Chen
UPDATED ACTUAL Exam Questions and
CORRECT Answers
If one's blood brain barrier (BBB) is compromised
a) ion concentrations in brain interstitial fluid will be altered.
b) brain blood flow will increase.
c) other mechanisms like CSF will protect the brain.
e) there will be no affect to brain functions. - CORRECT ANSWER - Ion concentrations
in brain interstitial fluid will be altered
The frontal lobe is involved in the following functions: (select that all apply)
personality
hypothesis generation
verbal communication
voluntary control of skeletal muscles
sensation - CORRECT ANSWER - personality
hypothesis generation
verbal communication
voluntary control of skeletal muscles
Which is NOT a function of the blood-brain barrier?
a) It prevents brain neurons from being exposed to drugs
b) It protects brain neurons from exposure to abnormal ion levels
c) It prevents nicotine and alcohol from entering brain interstitial fluid
d) It protects brain neurons from exposure to abnormal hormone levels
e) It prevents brain neurons from being exposed to waste products in the blood - CORRECT
ANSWER - It prevents nicotine and alcohol from entering brain interstitial fluid
, Response Feedback:
Alcohol and nicotine are fat-soluble substances that can cross through the BBB.
Molecules may pass through BBB through the following way:
Passive diffusion: fat-soluble substances dissolve in the cell membrane can cross the barrier (e.g.,
alcohol, nicotine and caffeine). Water-soluble substances such as penicillin have difficulty in
getting through.
Active transport: substances that the brain needs such as glucose and amino acids are carried
across by special transport proteins. Receptor-mediated transport: molecules link up to receptors
on the surface of the brain and are escorted through (e.g., insulin).
Which is NOT a function of cerebrospinal fluid?
a) CSF transports nutrients and chemicals to the brain.
b) CSF helps to reduce the effective weight of the brain.
c) CSF helps to remove waste products from the brain.
d) CSF helps to promote mitosis within neuronal tissue.
e) CSF provides a liquid cushion to protect the brain from sudden movements。 - CORRECT
ANSWER - CSF helps to promote mitosis within neuronal tissue
A neurovascular unit includes?
Endothelial cells
Pericytes
Microglials
Astrocytes
Interneurons - CORRECT ANSWER - Endothelial cells
Pericytes
Microglials
Astrocytes
Interneurons
UPDATED ACTUAL Exam Questions and
CORRECT Answers
If one's blood brain barrier (BBB) is compromised
a) ion concentrations in brain interstitial fluid will be altered.
b) brain blood flow will increase.
c) other mechanisms like CSF will protect the brain.
e) there will be no affect to brain functions. - CORRECT ANSWER - Ion concentrations
in brain interstitial fluid will be altered
The frontal lobe is involved in the following functions: (select that all apply)
personality
hypothesis generation
verbal communication
voluntary control of skeletal muscles
sensation - CORRECT ANSWER - personality
hypothesis generation
verbal communication
voluntary control of skeletal muscles
Which is NOT a function of the blood-brain barrier?
a) It prevents brain neurons from being exposed to drugs
b) It protects brain neurons from exposure to abnormal ion levels
c) It prevents nicotine and alcohol from entering brain interstitial fluid
d) It protects brain neurons from exposure to abnormal hormone levels
e) It prevents brain neurons from being exposed to waste products in the blood - CORRECT
ANSWER - It prevents nicotine and alcohol from entering brain interstitial fluid
, Response Feedback:
Alcohol and nicotine are fat-soluble substances that can cross through the BBB.
Molecules may pass through BBB through the following way:
Passive diffusion: fat-soluble substances dissolve in the cell membrane can cross the barrier (e.g.,
alcohol, nicotine and caffeine). Water-soluble substances such as penicillin have difficulty in
getting through.
Active transport: substances that the brain needs such as glucose and amino acids are carried
across by special transport proteins. Receptor-mediated transport: molecules link up to receptors
on the surface of the brain and are escorted through (e.g., insulin).
Which is NOT a function of cerebrospinal fluid?
a) CSF transports nutrients and chemicals to the brain.
b) CSF helps to reduce the effective weight of the brain.
c) CSF helps to remove waste products from the brain.
d) CSF helps to promote mitosis within neuronal tissue.
e) CSF provides a liquid cushion to protect the brain from sudden movements。 - CORRECT
ANSWER - CSF helps to promote mitosis within neuronal tissue
A neurovascular unit includes?
Endothelial cells
Pericytes
Microglials
Astrocytes
Interneurons - CORRECT ANSWER - Endothelial cells
Pericytes
Microglials
Astrocytes
Interneurons
