There is no accepted clinical definition of insanity

Your text offered a number of suggestions for behaviors related to good health. What is the key to performing these behaviors?

a) start them simultaneously b) make them a part of your daily routine c) see a physician before initiating any of them d) join a self-help group devoted to health concerns

In the nervous system, neurotransmitters are the main means of communication between neurons. The main means of communication between organs in the endocrine system is by ____.?

a. ?glands b. ?cytokines c. ?hormones d. ?thalamus