tailieunhanh - Ebook Atlas of the human body: Part 2

Part 2 book "Atlas of the human body" presentation of content: The endocrine system - Glands and hormones, the cardiovascular system, the lymphatic system and immunity, the digestive system, the urinary system and water balance, water balance water balance,. and other content. | 14/12/2008 02:11 PM Page 108 CHAPTER 7 The Endocrine System: Glands and Hormones Coloring Exercise 7-1 ➤ The Endocrine System and the Endocrine Glands The Endocrine System • Glands containing specialized endocrine cells A that produce regulatory chemicals (hormones B ) • Hormones regulate diverse body functions, such as water balance, growth, and reproduction Hormone Action • Hormones: chemical messengers that have specific regulatory effects on certain cells or organs • Mechanism of hormone action: • Endocrine cells A release hormones B • Hormones travel in the bloodstream C to all body cells • Hormones bind specific receptors D (proteins in the cell membrane, cytoplasm, or nucleus) on target cells E • Hormone-bound receptors affect cell activities (., membrane permeability, metabolic reactions, synthesis of specific proteins, cell division F ) • Hormones visit every cell, but only affect specific cells • Target cell E possess specific receptors D that bind the hormone. • Nontarget cells G will have different receptors H that bind different hormones. The Endocrine Glands • Specialize in hormone secretion • Thyroid gland I (Coloring Exercise 7-6) • Parathyroid glands J (Coloring Exercise 7-2): embedded in the posterior surface of the thyroid gland • Adrenal gland K (Coloring Exercises 7-7 7-8): consists of the cortex K1 and , the medulla K2 • Pancreas L (Coloring Exercise 7-3): also regulates digestion (Coloring Exercise 11-5) • Gonads (testes M , ovaries N ): primarily involved in reproduction • Pituitary gland O (Coloring Exercises 7-4 and 7-5): controls the thyroid gland, adrenal gland, and gonads Other Hormone-Producing Structures • Hypothalamus P , is part of the brain (Coloring Exercise 5-9) • Regulates many bodily functions using both the nervous system and the endocrine system • Works closely with the pituitary gland • Other brain parts, thymus, heart, stomach, duodenum, liver, kidney, and skin also secrete important .