The only way to discourage an undesirable behavior is to punish it.

Which of the following characteristics was established as a protected class in the Civil Rights Act of 1964 ?

A) sexual orientation. B) age. C) national origin. D) disability.

The blood brain barrier impedes the passage into cerebral neurons of

A) many proteins and other large molecules. B) all small molecules. C) glucose. D) sodium. E) all fluids.