Hormones: Some Definitions
and Winfried G. Rossmanith2 (1) Lenzkirch, Germany (2) Ettlingen, Germany 3.1 The Nature of the Endocrine System 3.2 What Is a Hormone? 3.2.1 Hormonal Effect 3.2.2 Neurotransmitters 3.2.3 Cytokines/Lymphokines 3.2.4 Prostaglandins/Thromboxanes…