This classification of drug typically changes the brain’s chemistry and reduces its ability to create its own endorphin's.

a. depressants
b. hallucinogens
c. narcotics
d. stimulants

In some states, medical marijuana is legal. this means that people who need to take marijuana because of a medical condition may take it only with approval from the doctor. however, officers still advise these people not to drive while under the influence. what is the main reason for this? they would become dangerous to themselves and other people. they would not able to read and follow street signs. they would not be capable of staying in only one lane. they would become dangerous to wildlife that may be present.

10. what is one long-term effect of tobacco use? changes in brain chemistry coronary heart disease decreased appetite increased heart rate

Which of these pieces of safety equipment should be worn when operating a chainsaw