When using disinfectant products, the dental assistant does not need to know a. the epa and ada acceptance labeling of the product. b. guidelines for the safe handling and use of these products. c. the dental history of the patient on whom the contaminated instruments were used. d. which product to use for what purpose

Smoking damages the respiratory system by inhalation of a foreign substance, that is absorbed and residue is left behind on our lungs sponge like substance. the gas that is inhaled also increase your blood pressure and dilates your blood vessels. also the process of inhaling and exhaling the smoke it causes irritation to the throat and mouth. smoking can cause lung cancer and other respiratory and circulatory diseases.