When faced with a potentially dangerous situation, increased ____________ nervous system activity prepares the body for rapid response by accelerating heart and respiratory rates and increasing blood pressure and muscle tension

You look through an old photographic slide-viewer toy,

which creates the impression of seeing a three-dimensional scene by one photograph of the scene being displayed to one eye and a slightly different view of this scene being presented to the other eye. When these two images are fused into one overall image, which of the following occurs? a. the motion parallax b. stereoscopic vision c. an aerial perspective d. visual assimilation

Regarding the spread of AIDS and its impact, which of the following statements is FALSE?

a. Thirty percent of new HIV infections in the United States are now transmitted through heterosexual sex. b. The focus on HIV/AIDS prevention may have deemphasized the health impact of the other STDs. c. A study of heterosexual adults found that the majority did practice safer sex with their last partner. d. Over the next 15 years, 65 million more people worldwide will die of AIDS unless prevention efforts are greatly expanded.