Both the heart and arteries contract to pump blood throughout the body.
i just took the test and it is true btw.

That is correct- the heart pumps and the smooth muscles of arteries contract (also called constriction)

Depression is lifelong, though you can get medication to with it. the difference between sadness and depression is that sadness lasts a little bit, depression last a long time and it goes on and off. people usually get depression through experiences they have been through, or genetics.

Ibelieve the correct answer is  stratum  lucidum.