When rats are exposed to stress in the lab, they exhibit signs of depression and evidence that the concentration of chemicals in their brains have been changed. These chemicals are known collectively as _________

During which phase of the sexual response cycle do the physiological changes of sexual arousal gradually decline?

a) plateau b) orgasm c) excitement d) resolution

The hypothalamus is involved in all of the following except

A) fleeing. B) mating. C) feeding. D) fighting. E) memory.