The thin covering over enamel on newly erupted primary teeth, which may stain very easily, is called ____________
a. neonatal lines
b. imbrication lines
c. lines of Retzius
d. Nasmyth's membrane
d
RATIONALE: The thin covering over enamel on newly erupted primary teeth, which may stain very easily, is called Nasmyth's membrane.
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Which of the following is one way firefighters can reduce exposure to carcinogens present in fires?
A. Clean helmet liners B. Follow good nutritional guidelines C. Maintain positive mental attitudes D. Maintain high levels of physical fitness
Some vector-borne illnesses are transmitted to humans via:
a. eating partially cooked foods. b. deer ticks. c. contact with human feces. d. sneezing and coughing.
Answer the following statement(s) true (T) or false (F)
Researchers may perform surgical procedures on animals without anesthesia.
Signs and symptoms of infection with cytomegalovirus include:
A. low back pain and pain during intercourse. B. a rash on the palms of the hands and fatigue. C. dysuria, foul-smelling discharge, and fever. D. fever, chills, fatigue, and an enlarged spleen.