Research on the Effects of Stress on the Immune System

Multiple Choice

Research on the effects of stress on the immune system suggests which of the following?

A) The immune system is not affected by stress.
B) Only certain types of stressors affect the immune system.
C) Suppression of immune system functioning by stress always ends immediately after the stressful period ends.
D) Suppression of immune system functioning by stress can apparently continue even after the stress itself is over.