Which of the following is permissible in ultrasonic cleaning? 

A. Placing all of the instruments together in the bath
B. Placing all instruments with hinges in the closed position
C. Removing the instruments from the ultrasonic cleaner and wrap without rinsing
D. Reusing the ultrasonic cleaning solution for several baths
E. Using anti-grease dishwashing detergent in the cleaning bath


D. Reusing the ultrasonic cleaning solution for several baths
The cleaning solution in an ultrasonic cleaner can be used several times, but must be replaced as needed to maintain effectiveness.

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Bacterial species that retain the purple dye even after the decolorizer is added and appear blue or violet are referred to as ________ ________ bacteria.

What will be an ideal response?

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The process of removing deposits and polishing the teeth is a ____________

a. prophylaxis b. root planing c. gingival curettage d. none of the above

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Answer the following statement(s) true (T) or false (F)

1. The placement of the heart in the thorax is to the left of the mediastinum.  2. The pericardial cavity normally contains blood.  3. The pericardial cavity is normally dry.  4. Blood returns to the heart from the lungs by way of the pulmonary arteries.  5. When in the lungs, the blood absorbs both oxygen and carbon dioxide. 

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Which of the following statements is NOT true about verbal communication?

A) It is auditory-based. B) It requires accuracy of the message. C) It requires clarity of the message. D) It is not affected by the sender's tone of voice.

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