According to Melzack and Wall's "gate theory" of pain, why does rubbing your elbow after you bump it help reduce the pain?
A. Rubbing produces an increased release of endorphins.
B. Rubbing produces a refractory period in nociceptors, preventing their further activation.
C. Input from rubbing competes with ascending pain messages.
D. The act of rubbing has a placebo effect on the pain.
Answer: C
You might also like to view...
A person who deals with stress in her life by overemphasizing the opposite personality characteristics of those that are her true but unacceptable feelings has adopted the defense mechanism called _______.
a. denial b. projection c. reaction formation d. sublimation
The most common reaction to a chronic illness is:
a. denial c. bargaining. b. depression d. fear
A researcher finds that men make more errors on a memory task than do women. After conducting the appropriate statistical test on this difference, he finds a probability level of less than .05 . The researcher will probably conclude that
A. the difference represents a chance fluctuation. B. the difference is statistically significant. C. if he conducts the study again, there is a high probability that no difference would be found or that women would make more errors. D. there is only a five in 100 chance that his finding represents a real difference between men and women.
In baseball an "out" can occur when a player strikes out, if the player is tagged out while running the bases, or if he hits a ball that is caught by an outfielder. Thus, the concept of an "out" would be considered a __________concept
a. prototypical b. conjunctive c. disjunctive d. connotative