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Endocrine System

Endocrine System. Jesse Crow & Mary Francis Baxter. Endocrine System and Homeostasis. Uses system of negative/positive feedback Positive feedback is rare High levels of one hormone = release of another 2 nd hormones usually causes secretion decrease

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Endocrine System

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  1. Endocrine System Jesse Crow & Mary Francis Baxter

  2. Endocrine System and Homeostasis • Uses system of negative/positive feedback • Positive feedback is rare • High levels of one hormone = release of another • 2nd hormones usually causes secretion decrease • Hypothalamus releases inhibiting or stimulating hormones • Neg.-regulates secretion of hormones • Most maintained at certain concentration • One cycle is thyroid • Regulates energy consumption • Protein production • calcium level in blood

  3. Most organisms have an endocrine system if they have circulatory and nervous systems Before endocrine, hormones were released by nervous system Cells of nervous system eventually formed glands

  4. Relationship to Nervous System • Nervous system responds to emotional stress • Hypothalamus-tissue of brain • Registers info • Sends messages to autonomic nervous system • Occurs in lower vertebrates/invertebrates

  5. Endocrine Glands Hormones of the pancreas Hypothalamus Parathyroids Posterior pituitary Thymus Anterior pituitary Pancreas Thyroid Gonads Adrenal gland Pineal gland

  6. Peptide Hormone composed of amino acids can range from 3-4 amino acids to entire polypeptide example: insulin and ADH Bind with receptor, work quickly Change in cell’s enzymes

  7. Steroid Hormone Ring-shaped Lipids made from cholesterol Form in adrenal glands and gonads Examples: oestrogens and progestins Bind to nuclear receptors -enter DNA -transcribes target Genes

  8. Diseases in the Endocrine System Diabetes Hyperthyroidism Cushings Syndrome

  9. Diabetes • Cause • Pancreas doesn’t produce enough insulin • Insulin normally carries sugar to blood for energy • (metabolism) • Severe results: blindness, heart disease, and kidney failure • Type 1:loss of insulin • Type 2:insulin resistance • Symptoms: -frequent urination -increased thirst -increased hunger • Treatment-insulin injections

  10. Hyperthyroidism • Treatment: -Anti-thyroid medications -Radioactive iodine -Surgery to remove the thyroid • Symptoms: -Difficulty concentrating -Frequent bowel movements -fatigue -increased sweating and appetite • Causes • Inflammation of thyroid gland • Non-cancerous growths on thyroid • Tumors on testes/ovaries • Too much iodine

  11. Cushings Syndrome • ACTH(adrenocorticotrophin hormone)-producing pituitary tumor • causes overproduction of cortisol • by the adrenal glands • Symptoms: • Weight gain • Sleep disturbance • depression • Treatment options: removal of tumor

  12. Works Cited http://www.google.com/imgres?q=steroid+hormones&um=1&hl=en&safe=active&sa=N&biw=1280&bih=933&tbm=isch&tbnid=pyKz9KA72NttNM:&imgrefurl=http://163.16.28.248/bio/activelearner/47/ch47c1.html&docid=NBWmk1qyJfzsyM&imgurl=http://163.16.28.248/bio/activelearner/47/images/ch47c1.gif&w=432&h=307&ei=cmRwT5ayOozQgAeH_oVs&zoom=1&iact=hc&vpx=182&vpy=440&dur=376&hovh=189&hovw=266&tx=126&ty=107&sig=104984583406905570724&page=2&tbnh=134&tbnw=189&start=30&ndsp=36&ved=1t:429,r:0,s:30 http://www.sparknotes.com/testprep/books/sat2/biology/chapter9section1.rhtml http://fog.ccsf.cc.ca.us/~mmalacho/physio/oll/Lesson2/transduct.html http://www.uic.edu/classes/bios/bios100/lectures/nervous.htm http://www.hormone.org/endocrine_system_diseases.cfm http://www.medicalook.com/Diabetes/ http://www.ncbi.nlm.nih.gov/pubmedhealth/PMH0001396/ http://www.google.com/imgres?q=hypothalamus&um=1&hl=en&safe=active&biw=1280&bih=827&tbm=isch&tbnid=kanVdhI3c4skYM:&imgrefurl=http://www.vivo.colostate.edu/hbooks/pathphys/endocrine/hypopit/anatomy.html&docid=qDVGyri6UFQHEM&imgurl=http://www.vivo.colostate.edu/hbooks/pathphys/endocrine/hypopit/sagpit.jpg&w=350&h=250&ei=Q1d0T6KsHsio0AGnpImDAw&zoom=1&iact=rc&dur=78&sig=105769914419866040626&page=1&tbnh=134&tbnw=188&start=0&ndsp=24&ved=1t:429,r:2,s:0&tx=142&ty=30 http://www.youtube.com/watch?v=qzjjW--I-2Q&safety_mode=true&persist_safety_mode=1&safe=active http://uvahealth.com/services/pituitary-neuroendocrine/conditions-treatments/cushings-disease?gclid=CKGxkf2QjK8CFcYRNAodkiiDJw

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