The Hormones: Physiology, Chemistry and Applications, Volume IV covers the advances in understanding the nature and function of plant and non-mammalian animal hormones. This volume is divided into 11 chapters, and begins with an examination of the major characteristics of auxins, including the diversity of its action, chemical control, and systematic patterns. The subsequent chapters explore the chemistry and physiology of neurohormones and their role in insect growth. A chapter highlights the control of color of hormones and the actions of 5-hydroxytryptamine. The remaining chapters are devoted to the occurrence, physiological role, biochemistry, mode of action, metabolism, and biosynthesis of other hormones, such as gastrointestinal hormones, catecholamines, insulin, and glucagon. These chapters deal also with the general principles and application of immunoassay of protein hormones. Endocrinologists, physiologists, biochemists, and hormone researchers will find this book invaluable.