Question 1
Sodium fluorophosphate is a chemical used in toothpaste to ________.
◦ make the paste white
◦ strengthen tooth enamel
◦ remove plaque
◦ keep the paste from spoiling
◦ disinfect the toothbrush
Question 2
When a part of the body is injured, substances called ________ are released.
◦ pain relievers
◦ aspirins
◦ chlorofluorocarbons
◦ prostaglandins
◦ nitrogen oxides