Chapter 17.5, Problem 14LO

Summary Introduction

To describe: How water-soluble hormones induce cellular change in their target cells.

Concept introduction: The endocrine glands are ductless organs located within organ systems and contain groups of endocrine cells that secrete their hormones directly into their surroundings. Water-soluble hormones, such as proteins and biogenic amines, are types of polar molecules that readily dissolve in the aqueous environment. They cannot transport across the plasma membrane and thus, require carrier proteins to cross the membrane.