The Endocrine System Broadcasting throughout the body!

PURPOSE of Endocrine System GLANDS RELEASE PRODUCTS (HORMONES) INTO BLOODSTREAM PRODUCTS (HORMONES) BROADCAST MESSAGES TO BODY LIKE A RADIO BROADCAST

GLANDS PRODUCE AND RELEASE SUBSTANCES OR SECRETIONS EXOCRINE GLANDS:EXOCRINE GLANDS: –SECRETE SUBSTANCES THROUGH DUCTS –EX: –EX: SWEAT AND TEARS ENDOCRINE GLANDS:ENDOCRINE GLANDS: –RELEASE SECRETIONS (HORMONES) DIRECTLY INTO BLOOD STREAM

HORMONES ACT AS THE BROADCASTERS BY FLOWING THROUGH BLOODSTREAM AFFECT ACTIVITY OF OTHER CELLS TARGET CELLS:TARGET CELLS: –CELLS THAT HAVE RECEPTORS FOR A PARTICULAR HORMONE –WHAT HAPPENS IF A TYPE OF CELL DOES NOT HAVE RECEPTORS?? CELL WILL NOT RESPOND TO THAT HORMONE!CELL WILL NOT RESPOND TO THAT HORMONE! –Ex. Testosterone will not affect heart cells, but adrenaline will SLOWER AND LONGER-LASTING THAN NERVE RESPONSES

CONTROL OF THE ENDOCRINE SYSTEM FEEDBACK MECHANISMSREGULATED BY FEEDBACK MECHANISMS –EX: HEATING SYSTEMSHEATING SYSTEMS ROOM COOLS DOWN FURNACE KICKS ON ROOM WARMS UP FURNACE KICKS OFF

CONTROL OF ENDOCRINE CON’T ACTUAL EXAMPLES IN BODY: CONTROLLING METABOLISM –H–HOW DOES OUR BODY REGULATE CELL ACTIVITY? MAINTAINING WATER BALANCE –H–HOW DO WE KEEP FROM GETTING DEHYDRATED? USING THE SHEET I GAVE YOU AND YOUR TEXTBOOKS, FILL IN THE INFO ON THESE TWO FEEDBACK MECHANISMS!