MDCAT Biology MCQ #2147

MDCAT Biology MCQ #2147

1. Question 1

   Q1. Which of the following is a characteristic of the blood-brain barrier?

   • A) Presence of fenestrated capillaries
   • B) Tight junctions between endothelial cells
   • C) Absence of pericytes
   • D) Lack of basement membrane

   Answer: Tight junctions between endothelial cells

   Explanation: Tight junctions between endothelial cells restrict passage across blood-brain barrier; fenestrated capillaries are elsewhere.