Question

the blood-brain barrier allows antibiotics to quickly cross into the brain to prevent a severe infection.

true
false

Explanation:

Analyze the function of the blood-brain barrier

The blood-brain barrier (BBB) is a highly selective semipermeable border of endothelial cells that prevents solutes in the circulating blood from non-selectively crossing into the extracellular fluid of the central nervous system.

Evaluate antibiotic penetration

Most antibiotics are large, hydrophilic, or highly charged molecules that cannot easily or quickly cross the intact blood-brain barrier. This restriction makes treating central nervous system infections (like meningitis) challenging, often requiring specific lipid-soluble antibiotics or high doses to achieve therapeutic concentrations.

Determine the truth value

Because the blood-brain barrier restricts and prevents most antibiotics from quickly crossing into the brain rather than allowing them to do so easily, the statement is false.

Answer:

• TRUE
• FALSE (Correct answer)