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

CHEMICAL REGULATION  CHEMICAL REGULATION IS ACCOMPLISHED BY THE ENDOCRINE SYSTEM

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

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

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

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?

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

CHEMICAL REGULATION  HUMAN ENDOCRINE SYSTEM

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!!

CHEMICAL REGULATION  DO YOU THINK PLANTS CAN RESPOND TO THEIR ENVIRONMENT?

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

CHEMICAL REGULATION PLANT HORMONES AUXIN STIMULATE OR SLOW GROWTH GIBBERELLINS STIMULATE GROWTH CYTOKININS STIMULATE CELL DIVISION IN SEEDS, AND INFLUENCE DIFFERENTIATION ETHYLENE RIPENING OF FRUITS ABSCISIC ACID SHEDDING OF LEAVES, SLOWING PLANT METABOLISM

CHEMICAL REGULATION  EXAMPLE OF HORMONE ACTION

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

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”!!