A case of some biomechanical research that greatly affected the technique and performances in
the sport of swimming occurred in the early 1970s, when a researcher discovered the
importance of hand motions while in the stroke.
True
False

Marijuana is an example of a(n) drug

Explain what is meant by the phrase “ethical behavior”.

9. withdrawal occurs when alcohol is removed from the system after the brain a. adapted to the continued presence of alcohol b. become physically saturated with alcohol c. become impervious to the effects of alcohol d. begun to treat alcohol as a poison