Extra Credit (5 Points): What is an opportunistic pathogen?  Some opportunistic infections follow the treatment of a primary infection with a broad-spectrum antibiotic.  Explain how this treatment can allow some members of the normal microbiota to become opportunistic pathogens and cause a superinfection. Hint: View the scoring rubric to see how I will grade your answer and what it should require.

_________are the arousal producing effects of sex hormones that increase the likelihood of sexual behavior.​

​The _________ isa central area on the underside of the hypothalamus that appears to function as a stop-eating center.

_____ is an example of a psychological need.​

​________ are regularly occurring experiences that can harm our well-being, even our sex lives.

_________ refers to the reasonably stable patterns of emotions, motives, and behavior that distinguish one person from another.​

_________is the swelling of thegenital tissues with blood, causing erectionof the penis and swelling of the areasurrounding the vaginal opening.​

The drive-reduction theory of Hull states that:

​ _________ such as pathogens, injuries, age, gender, and a family history of disease may strike us as the most obvious causes of illness.

​The immune system is able to fight off foreign substances like pathogens because of the functioning of white blood cells called _________.