Classify the statements about the blood-brain barrier shown at left as being tru

Question

Classify the statements about the blood-brain barrier shown at left as being true or false by dragging each into the appropriate box at the right. True Membranes that form the that allow permeation of some hydrophilic The blood brain barrier consists of three membranes: the dura, arachnoid, and pia mater Glucose freely diffuses through the lipid bilayer of cell membranes, so is not inhibited from entering the brain. Alcohol has rapid effects on the brain because it is highly soluble in lipid membranes of the blood-brain barrier False The blood-brain barrier reduces the access of some therapeutic substances to the brain. Morphine readily crosses the blood brain barrier, while the drug heroin does not. Reset

Explanation / Answer

TRUE

FALSE

TRUE

• Alcohol has rapid effect on the brain because it is highly soluble in lipid membranes of BBB.
• The BBB reduces the access of therapeutic substances to the brain.
• The glucose freely diffuses through the lipid bilayer of cell membranes, so it is not inhibited from entering the brain

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