The dental radiograph will appear lighter if the operator increases which setting?

During a positive expiratory pressure therapy session, a patient should be told to:

a. stop after 20 to 30 breaths. b. place lips into the mouthpiece. c. take a deep breath, and then actively ex-hale. d. breathe normally through the mouthpiece.

The sensitivity portion of the culture and sensitivity test is used to determine:

A. the organism's sensitivity to heat. B. how fast the organism grows in the culture medium. C. the bacteria present. D. the most effective antibiotic for treatment.