Chronic insomnia is defined as

A. having trouble falling asleep during the day.
B. having trouble falling asleep or staying asleep at least three nights a week for at least six months.
C. having trouble falling asleep at night at least once a week.
D. having trouble falling asleep or staying asleep at least three nights a week for at least three months.


Answer: D

Health & Biomechanics

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Enlargement of the lymph nodes in a particular area of the body could be caused by ________

A) cancer B) a severe infection C) a sore throat D) all of the above

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The Heimlich maneuver helps

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Salts of magnesium in antacids could result in which side effect?

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