All drugs that cross the blood-brain barrier
A) change brain chemistry.
B) have side effects.
C) alter perception.
D) do all of these.
Question 2
Which statement about drugs is true?
A) Legal drugs pose no health threat; illegal drugs do.
B) Neither legal drugs nor illegal drugs pose a health threat.
C) More people are killed by using illegal drugs than legal drugs.
D) Both legal drugs and illegal drugs may pose a heath threat.