Methamphetamine increases the release of dopamine from an axon's terminal button. Curare blocks the release of acetylcholine. Methamphetamine is a dopamine _____; curare is an acetycholine _____.

A severe famine in the Netherlands during World War II revealed that

A) the sensitive-period concept operates with nutrition. B) malnutrition during the first trimester is not associated with miscarriage. C) malnutrition during the second trimester is associated with large head size. D) malnutrition during the third trimester is associated with physical defects.

Basic emotions are

A) difficult to identify in the first few months of life. B) universal in humans. C) found only among humans. D) reflexive.