The purpose of pre-cleaning the dental operatory is to.. a) separate contaminated and uncontaminated waste. b) reduce the number of ­contaminated items in the treatment area. c) prevent debris, saliva, and blood from drying on instruments.

B.

All dentist equipment is used in the mouth. Many deseases, bacteria and viruses are transmitted trough saliva, and not all of these are weak. So, that is why we clean the dental operatory, to lower the chances of transmitting anything.

Hope it helped,

BioTeacher101

a scenario where a cell may be needed to perform a form of endocytosis is when transporting large molecules. a scenario where a cell may be needed to perform a form of exocytosis is when releasing the large molecule from the cell.