________ are produced by some white blood cells and act to destroy invading microorganisms in the body
a. Antibodies
b. Autogens
c. Antigens
d. Receptors
e. Astrocytes
Answer: a. Antibodies
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Even though there is a decline in the birth rate for U.S. teenagers, the rate of teenage pregnancy in the United States remains __________ compared to other industrialized countries.
A. 2 to 10 times higher B. 5 to 10 times higher C. 2 to 3 times lower D. 3 to 4 times lower
When given a cup of coffee before a race, a sample of runners were found to run the race faster than without coffee. If we then conclude that on average runners run faster after drinking coffee, this would be an example of
a. an illogical inference. b. an inferential inference. c. a statistical inference. d. a descriptive inference.
Lewis generally comes across as a quick-tempered individual. His anger is easily triggered by trivial situations. According to Eysenck's personality dimensions, which of the following is true of Lewis?
A) He is extraverted and stable. B) He is introverted and unstable. C) He is extraverted and unstable. D) He is introverted and stable.
Which of the following is NOT evidence that adenosine may be involved in the chemical induction of sleep?
a. adenosine is produced by brain activity b. adenosine inhibits the RAS c. adenosine has an inhibitory effect on neurons than maintain arousal d. caffeine blocks the receptor sites for adenosine