The three body systems that are responsive to psychosocial variables are:

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The autonomic nervous system, endocrine system, and immune system are all responsive to psychosocial variables. The autonomic nervous system is responsible for the fight or flight response and can be influenced by stress and emotions. The endocrine system produces hormones that also respond to stress and emotions. The immune system can be weakened by stress and negative emotions. The other options listed are either missing one of the three systems or include a system (such as the central nervous system) that is not typically considered responsive to psychosocial variables.

The Three Body Systems That Are Responsive to Psychosocial Variables