Thurstone's model of intelligence is best known for which of the following?

A) Differentiating between fluid and crystallized intelligence
B) Seven primary abilities that do not combine to make a "g" factor
C) A hierarchical model consisting of four levels of factors
D) The concepts of accommodation and assimilation
E) None of these

An injury in which all the layers of the skin are traumatically torn away from the body is known as a(n) :

A) abrasion.
B) avulsion.
C) laceration.
D) puncture wound.

The smooth muscle found in the iris of the eye and the walls of blood vessels, which contracts in response to neurotransmitters and hormones, is known as a ________ smooth muscle.