All the following structures have Blood-Brain Barrier except: (A) Pineal body, (B) Hypophysis cerebri, (C) Area postrema to IV ventricle, (D) Mammilary body
Answer is D. Some areas of the brain are devoid of the blood-brain barrier. These include pineal body, hypophysis cerebri, choroid plexuses and area postrema in fouh ventricle of brainReference: Chourasia; 6th edition; 462 page