CHEMICAL REGULATION

CHEMICAL REGULATION

CHEMICAL REGULATIONVS.

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) VSENDOCRINE (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

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

CHEMICAL REGULATION

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”!!