Shavit and colleagues reported that rats that received inescapable intermittent shock
showed
a. a decreased sensitivity to pain and decreased numbers of natural killer cells.
b. an increased sensitivity to pain and decreased numbers of natural killer cells.
c. a decreased sensitivity to pain and increased numbers of natural killer cells.
d. a decreased sensitivity to pain and normal levels of natural killer cells.
e. an increased sensitivity to pain and increased numbers of natural killer cells.
a. a decreased sensitivity to pain and decreased numbers of natural killer cells.
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Evidence of a secular trend can be found in the fact that
a. over the last 100 years more and more adolescents have enrolled and graduated from high school. b. over the last 100 years people have developed a healthier diet. c. over the last 100 years people have attained their adult height at earlier ages. d. over the past 50 years, there has been a decline in the amount of exercise in an adolescent's life.
Clark's nutcrackers apparently recall the location of something like _________ food caches
a. 100 b. 1,000 c. 2,000 d. 20,000
By age _____, children are quite good at producing complex and grammatically correct sentences
A) 2 B) 4 C) 6 D) 8
Who of the following individuals has two positive risk factors for suicide?
A) a devout woman B) a married man C) a divorced woman D) a man who is an atheist