Upper respiratory tract infections are more common in toddlers than in infants because:
A) they put things in their mouths.
B) they do not produce antibodies.
C) of a loss of passive immunity.
D) they are exposed to other children.
Answer: C) of a loss of passive immunity.
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Which of the following vitamins is produced by the skin after exposure to sunlight?
A) A B) K C) D3 D) E
Comfort refers to the absence of physical and emotional pain.
Answer the following statement true (T) or false (F)
Which of the following is meant when a prescription reads "iii gtt qid OS"?
Instill three drops in the left eye four times per day Instill three drops in the left ear four times per day Instill three drops in the right eye four times per day Instill three drops in the right ear four times per day
In normal dental radiographic procedures, the principal hazard to the operator is produced by which type of radiation?
scattered radiation direct radiation alpha radiation gamma radiation