Ambient air contains what percentage of oxygen?

A. 85%
B. 37%
C. 21%
D. 68%

Answer: C

Health Professions

You might also like to view...

If a patient has a known copayment, it should be collected

A. oncethe patient is settled in the exam room. B. viathe bill sent to the patient's residence. C. at the front desk by the reception staff. D. after the insurance company has paid.

Health Professions

Adjusting the height of an aluminum temporary crown is done by ____________

a. trimming the gingival margin b. using an acrylic bur on the occlusal of the temporary crown c. selecting a short temporary crown d. the height cannot be adjusted

Health Professions