Both fear and excitement activate the release of norepinephrine in the body.

true or false

24-karat gold is considered to be pure gold. 18-karat gold is considered to be about 75% gold. what is 18-karat gold considered a mixture rather than a pure substance? a) it has a variable composition of other elements and minerals. b) its color is different than pure gold. c) the gold atoms are not arranged in a repeating pattern. d) it can be melted and transformed into a different substance.

1. describe the concept of the unitary executive. discuss whether this concept is practical.

How does the author's discussion of schroeder's study contribute to the development of ideas about how children react to mistakes?