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LVN Program – 2 nd Semester

LVN Program – 2 nd Semester. Endocrine VNRS P025A. Mrs. Keele. Mrs. MOM G-ma P.T.A. C.N.A. Psych. Tech. LPN BSN. RN CN DON DSD DOE CRRN. Housekeeping. Be on time Breaks are flexible Dr. Water only! Casual environment Ask questions!. Syllabus. Hours/Days:

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LVN Program – 2 nd Semester

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  1. LVN Program – 2nd Semester Endocrine VNRS P025A

  2. Mrs. Keele • Mrs. • MOM • G-ma • P.T.A. • C.N.A. • Psych. Tech. • LPN • BSN • RN • CN • DON • DSD • DOE • CRRN

  3. Housekeeping • Be on time • Breaks are flexible • Dr. Water only! • Casual environment • Ask questions!

  4. Syllabus Hours/Days: Monday: 8:30 AM – 2:20 PM Tuesday: 8:30 AM – 2:20 PM One 20 min break in the AM and a 60 minute break for lunch

  5. General Rule • If you are unable to attend class, you must notify the instructor prior to class. • Only excused absences will be given an opportunity to make up quizzes/tests. • Cannot make up participation • Homework will not be accepted late unless excused by the instructor.

  6. Office Hours • Lunch and Breaks • Call me at home! • 793-1664 • Please do not call • after 10:00 p.m. • on Sundays

  7. Web site • www.portervillecolege.edu/eKeele/ • Search engine • PC web page – instructors web pages • E-mail • elizabethkeele@sbcglobal.net

  8. F.Y.I. • No need to bring books • Cel phones on vibrate • Tape players are encouraged

  9. HONESTY!

  10. Welcome to 2nd Semester • Harder? • Critical thinking • Full time job 

  11. What is the Endocrine System? • Similar to nervous system • Function • Communication • Control

  12. Endocrine vs. Nervous system

  13. Endocrine System The link between the nervous system and the endocrine system: The Hypothalamus

  14. Endocrine vs. Exocrine Endocrine: • Secrete hormones • Directly into the blood stream • Target specific organs/receptors • Specific action • No DUCTS

  15. Endocrine vs. Exocrine Exocrine: • Secrete fluids • Via ducts!

  16. Which type of gland would you expect to be more vascular? • Endocrine • Exocrine • Both are equally vascular • No fair asking a test question in the first hour of class!

  17. Endocrine Glands • Pineal • Pituitary • Thyroid • Parathyroid • Thymus • Adrenal Medulla • Adrenal Cortex • Islets of Langerhans • Ovaries • Testes

  18. General function of the Endocrine System • Secrete hormone • Affect rate of ongoing processes

  19. Epinephrine is a hormone secreted by the adrenal medulla. What affect would you expect epinephrine to have on the heart? • Change the color of the heart • Change the size of the heart • Change the speed of the heart beat • Change the strength of the heart beat

  20. What is a hormone? • Chemical • Bloodstream • Specific target cell / organ • Causes target cell to act  • Specific action! • h or i in body function

  21. Hormones are involved in all aspects of metabolism • Growth • Reproduction • Energy production • Regulation of fluid and electrolyte balance • Regulation of body pH • Resistance to stress

  22. Metabolism & Synthesis "Hormones are involved in all aspects of metabolism” Metabolism: Break-down of molecules to make energy (burning) Synthesis: Building-up of molecules

  23. How do hormones work? Non-linear, 6 step process

  24. 1. Homeostasis • Change in homeostasis • i.e. • Body temperature lowers • Heart rate slows • Increased blood sugar levels

  25. Sensors • Sensors  • Monitor homeostasis • Identify change in homeostasis  • Responds to change  • Initiate a specific stimuli 

  26. 3. Hormone secretion • Specific stimuli  • Endocrine gland  • Secretes hormone

  27. 4. Bloodstream • Hormone secretion directly into the bloodstream  • Circulated by the bloodstream  • Body

  28. 5. Target organ • Hormones in the blood stream  • entertarget organs/tissues that have “receptors” for that hormone

  29. 6. Action • The hormone (when it enters the target organ)  • produces a specificaction • Action is usually opposite to the initial homeostasis change. • (Body temperature lowers) increased body temp. • (Heart rate slows)  increase heart rate • (Decreased blood sugar levels)  increase BS levels • (Increase in blood glucose levels)  decrease BS levels • (High blood pressure)  lowers BP • (Dehydration)  increased hydration

  30. 1. Homeostasis • Specific action  • Restores homeostasis  • Sensor i stimuli  • i hormone secretion • Negative feedback!

  31. “Negative Feedback Mechanism” • “The effects of the hormone often will reverse the stimulus and ultimately lead to decrease secretion of the hormone.”

  32. “Negative Feedback Mechanism” i process (homeostasis) h stimuli  h hormone secretion  h process (homeostasis)  i stimuli  i hormone secretion

  33. How to assess the Endocrine System? • Not palpate • Not ascultate • HOW???? • Labs • S&S

  34. Key Concept! • “In the health physiological state, hormone concentration in the bloodstream is maintained at a relatively constant level.”

  35. Small Group Questions • Name three characteristics of the endocrine system. • What is the function of a hormone? • How do hormones work? • What is “Negative Feedback Mechanism”? • How do the endocrine systems and the nervous system communicate? • What must happen to a gland in order for it to secrete a hormone?

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