Question

QUESTION 4 Which of the following statements about the blood-brain-barrier (BBB) is NOT true? a. weaker near area posterma, pituitary & pineal glands Ob.composed of astrocytes and 'tight junctions c. large and electrically charged molecules pass out of the capillary easily d.small, uncharged molecules pass through the endothelial membrane e. glucose, amino acids, and fats are carried across the membrane by active transport

Answer 1

e. Large and electrically charged molecules pass out the capillaries easily

Explanation: this statement is false regarding blood brain transfer because large and electrically charged particles cannot pass out through the capillaries because BBB is mainly used to stop the unwanted solutes entering into cerebro spinal fluid. The BBB have the smaller capillaries between them only small molecules can pass to the endothelial tissue spaces .