65. The changes in the brain seen in marijuana users are similar to those seen in long-term alcohol users. c. first-time crack users.
b.
heroin users.
d. amphetamine users.

People who utilizes the progression principle will ensure their exercise program increases in frequency, intensity, time, and type. the changes need to happen gradually in order to ensure they make gains in their fitness program. a person who doesn't utilize the progression principle can still gain health benefits from exercising, but will not continue to improve in cardiovascular fitness.

Broken bone result of heredity

Good samaritan law protects civilians when they render aid to someone in need.