Answer: Only Dental Hygienists remove extrinsic stains, accretions, and calcareous deposits from teeth.
Explanation:
Answer: Measures the antigen levels on the cell surface
Explanation: Fluorescence-Activated Cell Sorting. Fluorescence-activated cell sorting (FACS) measures the antigen levels on the cell surface quantitatively. Cells are dyed with a fluorescent antibody, then placed in a stream of liquid which passes the focus of a laser, and each cell emits light.
Answer: 1930s
The term stress as it relates to the human condition first emerged in scientific literature in the 1930s, but it did not enter the popular vernacular until the 1970s (Lyon, 2012).
Hope this helps :)
