According to To Catch a Coldabout stress and the immune system, following initial assessments,
participants were
(a) exposed to five separate individuals infected with various cold viruses
(b) injected with one of five different cold viruses
(c) exposed to one of five cold viruses using nasal drops
(d) put in stressful situations and then immediately exposed to a cold virus
C
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James has been sleeping for about 90 minutes when his brain shows rapid, irregular waves. His blood pressure rises, his heart rate increases, and his skeletal muscles go limp. Which of the following is the most likely conclusion?
a. James is chronically sleep-deprived and his sleep, like his daytime activities, is abnormal. b. James is experiencing physiological changes that are normal for the third stage of sleep. c. James is experiencing unusual sleep because during the day he engaged in strenuous physical activities. d. James is experiencing physiological changes that are normal during REM sleep.
By age 2, the average youngster in the U.S. weighs around __________ pounds and is close to __________ tall
a) 25–30; 36 inches b) 25–50; 38 inches c) 40–65; 50 inches d) 50–60; 43 inches