Which statement about dreaming is true? a. dreams usually occur during rem sleep. b. dreams are always in black and white. c. one dream typically lasts all night. d. dreams always involve smells and sounds.

How does heroin affect cellular communication in the brain?

Which of these is most likely to prevent pregnancy? a. tracking of female body temperature to identify ovulation times b. proper condom use c. male withdrawal before ejaculation d. proper spermicide use

Look at the graph about the barriers to working out. what would 20 percent of the population report as a barrier for working out? inability to devote thirty minutes a day to working out lack of interest with creating a detailed workout schedule not having enough money to pay for yearly gym membership living in a community that does not have parks or a gym facility