PNB 2274 EXAM 3 REVIEW - DR. CHEN
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. - Answers :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 - Answers :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 -
Answers :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。 -
Answers :CSF helps to promote mitosis within neuronal tissue
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. - Answers :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 - Answers :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 -
Answers :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。 -
Answers :CSF helps to promote mitosis within neuronal tissue
