The following points highlight the three ways to control secretions of hormones. The three ways are: 1. Neural Control 2. Endocrine Control 3. Feedback Control. Secretion of Hormones: Way # 1. Neural Control: Some endocrine secretions are solely controlled by nerve impulses. Secretion of adrenal medullary hormones secretion of neuro-hypophysial hormones and various releasing hormones of hypothalamus are under this [...]
In this article we will discuss about Hormones. After reading this article you will learn about: 1. Definition of Hormones 2. Characteristics of Hormones 3. Synthesis of Hormones. Definition of Hormones: Hormones are chemical messengers (may be of proteins, lipids or amines), secreted from special cells of endocrine glands and maintain the physiological activities very specifically on target cells through [...]
The following points will highlight the activities of hormones in vertebrate body. The activities are: 1. Growth and Development 2. Reproduction 3. Maintenance of Internal Environment 4. Metabolism and Store. Hormone Activity # 1. Growth and Development: Some hormones play an important role in overall growth and development. In vertebrate body, growth regulating hormones are STH of anterior pituitary, thyroid [...]