12.
The term . . . . . . . . disorders is used when perceived stressors-mental events increase the susceptibility of the body to disease.

13.
. . . . . . . . is defined as a return to more primitive modes of behaviour, that is, to modes of behaviour characterizing a younger age.

18.
If the stressor continues to be present, the stage of . . . . . . . . begins, where in the body resists the effects of the continuous stressor.

20.
Which of the following statements best explains the third principle that in some situations the strength of avoidance increases more rapidly with proximity than does that of approach?