Physical dependence is often defined by the appearance of withdrawal symptoms when the drug is stopped

The term hassles refers to:

a) minor health problems that cause a person to miss at least one day of work. b) personal limitations that make it impossible for someone to pursue a desired goal. c) the necessity to interact with persons we dislike in order to obtain our goals. d) minor annoyances of everyday life.

All of the following have been shown to suppress the immune system EXCEPT __________

a) poor marital relationships. b) sleep deprivation. c) overeating. d) severe bereavement.