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Questions and Answers
What acts as a cushion and reduces injury for the brain?
What acts as a cushion and reduces injury for the brain?
- Brain capillaries
- Cerebrospinal fluid (CSF) (correct)
- Harmful metabolites
- Plasma membrane
What substances continue to move directly through the plasma membrane due to their lipid-solubility?
What substances continue to move directly through the plasma membrane due to their lipid-solubility?
- Glucose, amino acids, and ions
- Cerebrospinal fluid (CSF)
- Harmful metabolites, drugs, and other substances
- Oxygen; carbon dioxide; steroid hormones; most anesthetics; and alcohol (correct)
What is impermeable to water-soluble substances such as glucose, amino acids, and ions?
What is impermeable to water-soluble substances such as glucose, amino acids, and ions?
- Brain capillaries
- Cerebrospinal fluid (CSF)
- Blood–brain barrier (correct)
- Plasma membrane
What exchanges substances between the blood and extracellular fluid of the brain by way of highly selective membrane-bound protein carriers?
What exchanges substances between the blood and extracellular fluid of the brain by way of highly selective membrane-bound protein carriers?
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What are the three continuous sheets of connective tissue covering the spinal cord and brain?
What are the three continuous sheets of connective tissue covering the spinal cord and brain?
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