When a bag-valve ventilation device is used with supplemental oxygen, it delivers an oxygen concentration of ________ percent

The signs and symptoms of poisoning in children:

A. vary widely, depending on the child's age and weight. B. are more obvious than in the adult population. C. usually present within the first 10 minutes of ingestion. D. are most severe if the child ingested a poisonous substance.

Which of the following statements was summarized from the NHANES III study?

A) Females had better periodontal health than males. B) Older individuals had more periodontal disease. C) Gingivitis was occurring in overall high rates. D) Aggressive periodontitis was very common.