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Lecture AP Biology - Chapter 45: Hormones and the endocrine system

Chapter 45 - Hormones and the endocrine system. After studying this chapter you will be able to understand: Two ways hormones affect target organs; the secretion, target, action, and regulation of at least 3 hormones; an illustration of both positive and negative feedback in the regulation of homeostasis by hormones. | Ch. 40 Warm-Up What type of behavior in animals might be triggered by cold temperatures? What type of behaviors might be triggered in hot temperatures? List 2 examples of negative feedback. List 2 examples of positive feedback. What is the main type of chemical messenger in the endocrine system? The nervous system? Warm-Up Compare and contrast the nervous system with the endocrine system. (Focus on the effects on the body) Define neurosecretory cell. What is its function? Give an example of positive and negative feedback in the endocrine system. How do they function? Ch. 45 Warm-Up Compare peptide hormones to steroids. Explain how insulin and glucagon work to regulate blood sugar levels. Which glands and hormones respond when your body is under stress? Chapter 45 Hormones and the Endocrine System A hormone called ecdysteroid regulates the timing of metamorphosis in this anise swallowtail butterfly. You must know: Two ways hormones affect target organs. The secretion, target, action, and regulation of at least 3 hormones. An illustration of both positive and negative feedback in the regulation of homeostasis by hormones. Types of Intercellular Signaling Endocrine System = Hormone-secreting cells + Tissues Endocrine glands: ductless, secrete hormones directly into body fluids Hormones: chemical signals that cause a response in target cells (receptor proteins for specific hormones) Affects 1 tissue, a few, or most tissues in body Or affect other endocrine glands (tropic hormones) Regulation by Positive & Negative Feedback Pheromones Hormones Local Regulators Chemical signal from 1 individual to another individual Chemical signal from endocrine gland through blood to target cell Chemical signal from one cell to an adjacent cell Eg. ant trail; sex phermones Eg. peptide, steroid hormones Eg. cytokines, growth factors, nitric oxide (NO) Discovery Video: Endocrine System Types of Hormones Peptide Water-soluble Bind to receptors on plasma membrane & triggers signal . | Ch. 40 Warm-Up What type of behavior in animals might be triggered by cold temperatures? What type of behaviors might be triggered in hot temperatures? List 2 examples of negative feedback. List 2 examples of positive feedback. What is the main type of chemical messenger in the endocrine system? The nervous system? Warm-Up Compare and contrast the nervous system with the endocrine system. (Focus on the effects on the body) Define neurosecretory cell. What is its function? Give an example of positive and negative feedback in the endocrine system. How do they function? Ch. 45 Warm-Up Compare peptide hormones to steroids. Explain how insulin and glucagon work to regulate blood sugar levels. Which glands and hormones respond when your body is under stress? Chapter 45 Hormones and the Endocrine System A hormone called ecdysteroid regulates the timing of metamorphosis in this anise swallowtail butterfly. You must know: Two ways hormones affect target organs. The secretion, target, action, .