The cornea obtains nutrients from
A. its own blood supply.
B. the aqueous humor.
C. the vitreous humor.
D. the blood supply of the iris.
Answer: B
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What is the leading cause of death in young adulthood?
A. accidents B. suicide C. homicide D. AIDS
When decreases in one variable are accompanied by decreases in another variable, the variables are described as
a. negatively correlated. b. positively correlated. c. causally related. d. prospectively related.
Karen Allen had female students attempt to solve relatively difficult math problems. One third of the participants were allowed to have their dog with them while they worked on the problems, one third had a close friend with them, and the remainder worked on the problems while they were alone. The results of the study indicated that:
a. having either a dog or a close friend present reduced stress-related arousal b. having a dog present was associated with the lowest arousal effects c. having either a dog or a close friend present increased stress-related arousal d. having a dog present was associated with the highest arousal effects
Malcolm became frustrated because he could not fit one of the pieces of a puzzle into place. His father oriented the piece correctly so that Malcolm could slip it into the puzzle. The father provided Malcolm with a
a. negative reinforcer. c. concrete operation. b. scaffold. d. concept.