To ensure consistency in the sizes and lengths of the intracanal endodontic instrumentation, the ADA and manufacturers have standardized a name-number and color-code system. Which group of files are flexible and used for curved and narrow canals?
a. Barbed broach
b. K-type
c. Hedstrom
d. Flex
d
RATIONALE: To ensure consistency in the sizes and lengths of the intracanal endodontic instrumentation, the ADA and manufacturers have standardized a name-number and color-code system. Flex files are flexible and used for curved and narrow canals.
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Which of the following statements indicates that the speaker understands allergic reactions and anaphylaxis?
a. "An allergic reaction only occurs when the patient ingests or inhales an allergen; anaphylaxis occurs when the allergen is injected." b. "Allergic reactions are caused by pollen and food; anaphylactic reactions are caused by venoms and medications." c. "Anaphylaxis is a severe allergic reaction that will lead to death without emergency care." d. "Anaphylaxis describes a severe allergic reaction that occurs the first time a person is exposed to an allergen."
What is the leading cause of death by poisoning in the United States?
A. arsenic poisoning B. salmonella food poisoning C. carbon monoxide poisoning D. botulism food poisoning
An 11-year-old patient is brought to the clinic by his mother. She explains that her son becomes short of breath and emits a wheezing sound while playing soccer. The physician suspects asthma and recommends rescue medication PRN. Which of the following can be administered PRN for the purpose of bronchodilation?
A. albuterol B. Beclovent (beclomethasone) C. Intal (cromolyn sodium) D. Floradil (formoterol)
Which ions account for over 90% of the positively charged ions in extracellular fluid?
a. Ca+ c. Na+ b. Mg+ d. K+