Genetic and Epigenetic Regulation of Stem Cell Homeostasis ...
CHEMICAL REGULATION. CHEMICAL REGULATION VS. NERVOUS REGULATION WHAT’S THE POINT OF REGULATION? ...
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Transcript of CHEMICAL REGULATION. CHEMICAL REGULATION VS. NERVOUS REGULATION WHAT’S THE POINT OF REGULATION? ...
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”!!