Blood brain barriers is absent in all of the following areas except__________________?
Correct answer: B. Habenuclear trigone
- A. Subfornical region
- B. Habenuclear trigone
- C. Area posterma
- D. Neurohypophysis
Explanation
The subfornical organ, area postrema, and neurohypophysis are circumventricular regions with an absent or highly reduced blood-brain barrier. The habenular trigone retains the barrier, making it the exception.
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