ABSTRACT

Study objectives Dene the internal environment Understand the importance of homeostasis Describe the overall function of each of the three major components of the nervous system Compare the general functions of the nervous system and the endocrine system Distinguish between negative feedback and positive feedback Describe the potential role of medications in the maintenance of homeostasis

. Introduction Physiology is the study of the functions of the human body. In other words, if anatomy describes the structure or morphology of the parts of the body, physiology describes how these parts work. This discipline considers the mechanisms by which each of the various tissues and organs carries out their specic activities. Emphasis is placed on the processes that control and regulate the physiological activities in the body.