Chapter 49.3, Problem 1C

Summary Introduction

To explain: The roles of receptors and second messengers in hormone action.

Introduction: The endocrine system is the chemical signaling system that uses blood vessels as information channels. The endocrine glands are ductless organs located within the organ systems and contain groups of endocrine cells that secrete their hormones directly into their surroundings. Hormones are signaling molecules that help to regulate the physiology and behavior. The cells that are influenced by a particular hormone are known as target cells. They have specific binding receptors on the surface of the cell or within the cell. Hormones bind to these receptors to produce a characteristics response.