Which of the Following Would Not Apply to the Blood-Brain

question 27

Multiple Choice

Which of the following would not apply to the Blood-Brain Barrier?

• A) Water-soluble substances cross by active transport whereas substances such as creatinine, urea, and most ions, cross very slowly.
• B) It protects the CNS from harmful substances and pathogens by preventing passage of these substances from blood into the interstitial fluid of brain tissue.
• C) Proteins and most antibiotic drugs-do not pass at all from the blood into brain tissue.
• D) Trauma, toxins, and inflammation will generally not harm the blood-brain-barrier.
• E) Lipid soluble substances, such as oxygen, carbon dioxide, alcohol, and most anesthetic agents, easily cross the blood-brain barrier.

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