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Set Cornell Notes on pg. 29.6upThe Endocrine System and Hormones 53 29.6 The Endocrine System and 2.1 Atoms, Ions, •Topic: 29.6 The Endocrine and Molecules Hormones System and Hormones •Essential Question(s): 1. Create a double bubble that compares the endocrine system and the nervous system. KEY CONCEPT The endocrine system produces hormones that affect growth, development, and homeostasis. 29.6 The Endocrine System and Hormones KEY CONCEPT The endocrine system produces hormones that affect growth, development, and homeostasis. 29.6 The Endocrine System and Hormones • The endocrine system is a collection of physically disconnected organs • Control growth, development, and responds to your environment 29.6 The Endocrine System and Hormones Try and come up with 2 more examples at your table • Ex: body temperature. When you exercise you start to feel warm. Your endocrine system tells your body to sweat more so you cool down. • • • • • • Salt level Blood sugar Sexual development Growth Metabolism Anything controlled by hormones 29.6 The Endocrine System and Hormones • Works more slowly than the nervous system. – only chemical signals (hormones) – signals move through bloodstream target cell hormone bloodstream receptor not a target cell 29.6 The Endocrine System and Hormones • Only cells with certain receptors can receive the signals • Works like a satellite system • Sends signals in all directions, but you need special receivers to get the signals 29.6 The Endocrine System and Hormones • Glands are organs of the endocrine system. – Glands secrete hormones 29.6 The Endocrine System and Hormones • Hormones are chemical signals or messengers that influence cell’s activities. – produced by glands – travel through the circulatory system (blood stream) – affects cells with matching receptors target cell hormone bloodstream receptor not a target cell 29.6 The Endocrine System and Hormones • There are many glands located throughout the body. Hypothalamus: makes hormones that stimulate other glands to release hormones Pituitary: controls growth and water in blood Thyroid: metabolism, energy levels, digestion Thymus: helps white blood cells fight off infection Adrenal Glands: breathe faster, increase blood pressure- heart increases strength Pancreas: Controls blood sugar by adding or removing sugar from the blood Ovaries and Testes: Cause sexual maturation, influence sexual characteristics – Hormones travel through the bloodstream to cells with matching receptors. 29.6 The Endocrine System and Hormones 2)How does releasing hormones help glands to communicate with one another? • The glands are not connected. Releasing hormones stimulate other glands to produce and release their hormones. 29.6 The Endocrine System and Hormones Hormonal imbalances can cause severe illness. • Abnormal hormone levels affect homeostasis. • Hormonal imbalances might be treated with surgery or medicine. • Steroids, a pituitary tumor, or some prescription drugs can make the pituitary overactive and indirectly cause problems. 29.6 The Endocrine System and Hormones Robert Wadlow- (1918-1940) •8 ft 11.1 in and 485 lbs •Pituitary gland disorder- gave him too much of the growth hormone •Used leg braces to walk, had little feeling in his legs and feet •Died at the age of 22 from an infected ankle blister Tallest man EVER recorded! 29.6 The Endocrine System and Hormones Jon Brower Minnoch (19411983) •Heaviest man ever recorded •Peak weight 1,400 lbs •Suffered from generalized edema – his body retained massive amounts of fluid. Over 900 lbs was due to the fluid. •Was hospitalized. Put on a strict diet and dropped to 475 lbs •Returned a yr later weighing 952 lbs •They discontinued treatment because his edema was incurable 29.6 The Endocrine System and Hormones Quick Includes CNS and PNS Send signals Slower disconnected Respond to stimuli Connected Nervous Endocrine network system system Controls thoughts and movement Electrical Signals Maintain homeostasis Chemical Signals Controls growth and development