LE 1 5/ 6/2011 LE 3 5/2/2011. A. Function regulate and coordinate body systems

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1 Do Now: What messages does your body get while riding a roller coaster? Aim: How does the endocrine system work? Homework LE 1: Use p Make a chart what it does LE 1 5/ 6/2011 LE 3 5/2/2011 Internal Body Regulation A. Body is regulated/ controlled by the Endocrine and Nervous systems that receive information from and send feedback to all other body systems A. Function regulate and coordinate body systems b. Structures composed of ductless glands that secrete chemical s called hormones directly into the bloodstream Glands: Pituitary Hypothalamus Thyroid Pancreas Adrenals Testes Ovaries 1. Rd pp top, Copy & Answer: p.164 #1,2 3. Compare & contrast the male & female Reproductive organs Hormone chemical messengers made in endocrine glands; these messengers have specific targets in the body Negative Feedback System endocrine system gives itself messages to control the production & release of hormones Nov 20 6:39 AM Nov 30 12:31 PM Internal Body Regulation Body is regulated/ controlled by the Endocrine and Nervous systems that receive information from and send feedback to all other body systems Hormone chemical messengers made in endocrine glands; these messengers have specific targets in the body Purpose: Maintain Homeostasis A. Function regulate and coordinate body systems hormones are released by glands directly into bloodstream travel to target cells Receptor proteins in the cell membrane receive the signals b. Structures composed of ductless glands that secrete chemical s called hormones directly into the bloodstream Glands: Pituitary Hypothalamus Thyroid Pancreas Adrenals Testes Ovaries Goal: Negative Feedback System endocrine system gives itself messages to control the production & release of hormones Nov 30 12:31 PM Nov 20 8:57 AM LE 1 5/6/2011 May 2 1:03 PM May 5 8:43 AM 1

2 Nov 30 1:53 PM Nov 30 1:16 PM Aim: What are negative feedback systems? Do Now: Describe what your body does when you get hungry? Homework LE3 5/6/2011 LE 1 5/7/2011 Read pp P.488 # 1 6 Nov 24 9:50 AM Nov 30 12:29 PM Negative Feedback System endocrine system gives itself messages to control the production & release of hormones All homeostatic mechanisms use negative feedback to maintain a constant value set point whenever a change occurs in a system, this automatically causes a corrective mechanism to start, which reverses the original change and brings the system back towards the set point May 5 11:32 AM May 5 12:45 PM 2

3 May 5 1:30 PM May 6 6:38 AM Plasmids are then incubated with a weakened strain of E. coli Since only some of the bacteria will take up the plasmid,a gene encoding an enzyme which breaks down a certain antibiotic is also included in the plasmid, which allows bacteria with the plasmid to grow on a plate containing the antibiotic while the other bacteria die. These bacteria are then allowed to grow and replicate Plasmid and the insulin gene replicates millions of times Bacteria are given a signal to produce the protein, and insulin identical to that of humans ca be produced This insulin, is named humulin, can then be used to treat many people with type I diabetes without the worry of allergic reaction. May 6 6:29 AM Nov 24 10:22 AM Hungry signal from stomach to brain Eat Food is digested Macromolecules break down to building blocks Blood Glucose Rises; Stimulates production of Insulin in Pancreas Glucose delivered to cells by insulin molecules in the bloodstream May 5 10:15 AM May 5 11:40 AM 3

4 Aim: How does the endocrine system help the body achieve homeostasis? Do Now: What is considered to be normal body temperature? Why do you think that normal body temperature is as high as the temperature on a hot summer day? Homework: Use pp Vocab: Homeostasis, negative feedback, hormone Homeostasis *Goal of the Nervous System + Endocrine system is to achieve homeostasis by regulating the internal environment. *Homestasis maintenance of the internal environment within tolerable limits *Examples: heart rate, body temperature, water balance, and the secretions of the pituitary gland). 2.Describe and draw a diagram of a negative feedback system. Include organs if you know them. Do not use an example from class Nov 24 9:05 AM Nov 24 9:02 AM Along with the nervous system, it is the bodies control system Hormones are the chemicals (proteins) that are sent through the blood by the organs of the endocrine system have target organs a ductless system, released directly into the blood Homeostasis A state of balance in the body, maintenance of the internal environment within tolerable limits Organ Hormone Action Pancreas Adrenal Adrenaline Human growth hormone Pituitary Insulin Testosterone "Master Gland" Females & males have both hormones * females have more estrogen Estrogen Gonads: Ovaries & Testes Regulates blood sugar *males have more testosterone *Testosterone & Estrogen are responsible for secondary sex characteristics ''Fight or Flight" Nov 20 8:43 AM Nov 20 11:28 AM 802 Hungry Eat Digest food Energy Glucose goes into blood stream Pancreas senses blood glucose increase & makes insulin Insulin transports Glucose from blood to cells Pancreas senses decreased BGL Room202/ 803 Comfortable Room Open window \cold air came in students jackets, and<fdwirdocrc/ojea closed window Students relieved warmer, more comfortable Stops making insulin due to "Negative Feedback" re: BGL rubbed arms & hands put hands in sleeves Nov 24 2:04 PM Nov 24 10:50 AM 4

5 Homeostasis A state of balance in the body, maintenance of the internal environment within tolerable limits EndocrineSystem_2011.notebook Along with the nervous system, it is the bodies control system Hormones are the chemicals (proteins) that are sent through the blood by the organs of the endocrine system have target organs a ductless system, released directly into the blood Hormone Action Organs Adrenal Pancreas ituitary Master Gland" Gonads Testes Adrenaline ''Fight or Flight" Insulin Human growth hormone Testosterone Ovaries Estrogen Females & males have both hormones. * females have more estrogen *males have more testosterone *Testosterone & Estrogen are responsible for secondary sex characteristics Regulates blood sugar Nov 24 9:02 AM Nov 20 8:43 AM Nov 21 12:05 PM Nov 20 8:52 AM Aim: How do the endocrine and reproductive systems work together? Reproduction Do Now: Describe what would happen to 3 of your body systems if you needed to run for a mile? Classwork: Use Reading Essentials Book Read pp Copy & Answer questions # 1-6 P.82 Copy all vocabulary words P.82 # 2 Homework Read pp p. 169 # 1, 2, 5, 6 A. Reproduction & 1. Reproduction is the process that continues life 2. The human reproductive system needs hormones to function *Estrogen *Testosterone (There are other hormones) B. Males 1. Sperm cells are produced in the testes, leave through the penis C. Females 1. Egg cells are produced in the ovaries 2. If fertilization of egg occurs by a sperm, it can develop in the uterus D. Menstrual Cycle 1. A female's menstrual cycle occurs approx. every 28 days 2. If an egg is not fertilized, the lining of the uterus breaks down is shed in a process called menstruation Nov 24 1:36 PM Dec 3 10:41 AM 5

6 EndocrineSystem_2011.notebook Nov 20 7:04 AM May 5 12:33 PM May 5 12:30 PM May 5 12:34 PM Summary 1. Homeostasis is and the goal of the endocrine system. 2. The endocrine system releases. 3. are chemical messengers that travel through the blood. 4. are released by the endocrine glands. 5. Negative feedback is when an increase in a causes the gland to releasing the. 6. Homeostasis is achieved through feedback. 7. Summarize negative feedback in your own words: May 5 12:35 PM Nov 20 1:25 PM 6

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