Which mineral is essential for hemoglobin?
a. phosphorus
b. calcium
c. magnesium
d. iron
D
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The pre contemplation stage is characterized by
A. a belief that there is no need for change. B. a modification of behavior. C. a planning for change. D. an awareness of the problem.
Which term refers to the epidemic of physical inactivity in the United States?
a. Inactive Death Syndrome b. Physical Activity Syndrome c. Secondary Condition Syndrome d. Sedentary Death Syndrome e. Preventable Death Syndrome
White blood cells that directly destroy virus-infected and cancerous cells are ______ cells.
A. helper T B. suppressor T C. natural killer D. B
In the United States, nearly what percentage of people infected with HIV are unaware of the infection?
A. 8 percent B. 13 percent C. 22 percent D. 30 percent E. 44 percent