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CHEMICAL REGULATION

CHEMICAL REGULATION. CHEMICAL REGULATION. CHEMICAL REGULATION VS. NERVOUS REGULATION WHAT’S THE POINT OF REGULATION? BOTH PROMOTE HOMEOSTASIS THROUGH THE RESPONSE TO CHANGING INTERNAL AND EXTERNAL CONDITIONS SO WHAT IS DIFFERENT ABOUT THEM?

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CHEMICAL REGULATION

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  1. CHEMICAL REGULATION

  2. CHEMICAL REGULATION • CHEMICAL REGULATION VS.NERVOUS REGULATION • WHAT’S THE POINT OF REGULATION? • BOTH PROMOTE HOMEOSTASIS THROUGH THE RESPONSE TO CHANGING INTERNAL AND EXTERNAL CONDITIONS • SO WHAT IS DIFFERENT ABOUT THEM? • NERVOUS REGULATION RESPONDS FASTER THAN CHEMICAL REGULATION

  3. CHEMICAL REGULATION • CHEMICAL REGULATION IS ACCOMPLISHED BY THE ENDOCRINE SYSTEM

  4. CHEMICAL REGULATION • ENDOCRINE SYSTEM • COMPOSED OF GLANDS • SPECIALIZED ORGANS THAT CREATE SUBSTANCES/CHEMICALS NEEDED BY THE ORGANISM • TWO TYPES OF GLANDS • EXOCRINE (DUCT) VSENDOCRINE (DUCTLESS)

  5. CHEMICAL REGULATION • GLANDS • THE SUBSTANCES/CHEMICALS THEY PRODUCE ARE CALLED: • HORMONES!! • CHEMICALS PRODUCED IN PART OF THE BODY THAT AFFECT A DIFFERENT PART • EXAMPLES??

  6. CHEMICAL REGULATION • HOW COME HORMONES, LIKE INSULIN, AREN’T RELEASED CONSTANTLY? • REMEMBER, HOMEOSTASISMUST BE MAINTAINED!! • FEEDBACK MECHANISMS!! • NEGATIVE VS.POSITIVE

  7. CHEMICAL REGULATION

  8. CHEMICAL REGULATION • FEEDBACK MECHANISMS • NEGATIVE FEEDBACK • PRODUCTS OF THE REACTION SLOW/STOP THE REACTION • EXAMPLE? • POSITIVE FEEDBACK • PRODUCTS OF THE REACTION SPEED/QUICKEN THE REACTION • EXAMPLE?

  9. CHEMICAL REGULATION • HOW DO HORMONES WORK? • STEROID HORMONE VS.PROTEIN HORMOONE

  10. CHEMICAL REGULATION • HUMAN ENDOCRINE SYSTEM

  11. CHEMICAL REGULATION

  12. CHEMICAL REGULATION

  13. CHEMICAL REGULATION • MAJOR ORGANS AND GLANDS • ADRENAL GLANDS  ADRENALIN (A.K.A. EPINEPHRINE) • PANCREAS  INSULIN & GLUCAGON • DIABETES  ?? • GONADS • OVARIES  ESTROGEN & PROGESTERONE • TESTES  TESTOSTERONE • *ANABOLIC STEROIDS!!

  14. CHEMICAL REGULATION • DO YOU THINK PLANTS CAN RESPOND TO THEIR ENVIRONMENT?

  15. CHEMICAL REGULATION • DO PLANTS HAVE BRAINS/NERVOUS SYSTEMS? • WHAT DID WE JUST LEARN IS ANOTHER WAY TO RESPOND/REGULATE? • CHEMICAL REGULATION • PLANTS PRODUCE HORMONES!

  16. CHEMICAL REGULATION

  17. CHEMICAL REGULATION • EXAMPLE OF HORMONE ACTION

  18. CHEMICAL REGULATION • TYPICAL PLANT RESPONSES INCLUDE: • TROPISMS • PHOTOTROPISM • THIGMOTROPISM • HYDROTROPISM • GEOTROPISM • PERIODISMS • PHOTOPERIODISM • SHORT-DAY VS.LONG-DAY

  19. CHEMICAL REGULATION • WHAT ARE THE LIFE PROCESSES? • H.N.T.R.S.G.E.R.M.R.? • WHICH ONE IS LEFT FOR US TO COVER? • R  REPRODUCTION • LET’S TALK ABOUT “IT”!!

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