What is the effect called when a person needs drugs just to bring the dopamine levels back up to normal, and more of the drug is needed to create a dopamine flood?

The media influences tobacco use by teens how? a) by showing beautiful, strong, and popular people using tobacco and cigarettes b) tobacco companies describing all the health effects of tobacco use c) cigarette businesses explaining all of the addictive qualities of tobacco use d) none of the above

Which is the lipid molecule that controls what types of molecules can pass though?

  when we experience conflict, it threatens our needs to feel