Which of the Following Statements About the Major Distribution Barriers

Multiple Choice

Which of the following statements about the major distribution barriers (blood-brain or fetal-placental) is true?

A) Water soluble and ionized drugs cross these barriers rapidly.
B) The blood-brain barrier slows the entry of many drugs into and from brain cells.
C) The fetal-placental barrier protects the fetus from drugs taken by the mother.
D) Lipid-soluble drugs do not pass these barriers and are safe for pregnant women.