Which of the following is responsible for preparing the body for defensive action? a. sympathetic nervous system b. autonomic nervous system c. somatic nervous system d. parasympathetic nervous system peripheral nervous system (ap psychology)

What is the main difference between trace elements and the main elements that make up the body? 1) main elements consist of heavier atoms. 2) trace elements are only needed in small amounts. 3) trace elements consist of heavier atoms. 4) main elements are only needed in small amounts.