A basic experiment involves a minimum of ________ participant group(s).

When children who lack growth hormone (GH) are given synthetic injections of GH starting at an early age, they

A) grow normally until the beginning of puberty. B) show catch-up growth and then grow at a normal rate. C) still reach an average mature height of only about 4 to 4½ feet. D) gain more in weight than in height.

Which of the following comments on brain function would be most likely to be made by Aristotle?

a. The mind acts through the pineal body to control the body. b. The brain serves to cool the passions of the heart. c. The brain is the seat of emotion, but not thought. d. The brain routes sensory information to the heart e. Injury to the brain alters emotion and thought.