nervous regulation
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NERVOUS REGULATION. NERVOUS REGULATION. WHAT ARE ALL THE LIFE PROCESSES? H.N.T.R.S.G.E.R.M.R WHICH ONES HAVE WE COVERED? H.N.T.R.S.G.E. WHAT ARE WE UP TO? R REGULATION / RESPONSE WHAT IS THIS EXACTLY? - PowerPoint PPT PresentationTRANSCRIPT
NERVOUS REGULATION
NERVOUS REGULATIONWHAT ARE ALL THE LIFE PROCESSES?
H.N.T.R.S.G.E.R.M.RWHICH ONES HAVE WE COVERED?
H.N.T.R.S.G.E.WHAT ARE WE UP TO?
R REGULATION / RESPONSEWHAT IS THIS EXACTLY?
THE ENVIRONMENT, BOTH INTERNAL AND EXTERNAL, IS CONSTANTLY CHANGING…ORGANISMS MUST RESPOND TO THESE CHANGES AND REGULATE/CONTROL THESE RESPONSES ACCORDINGLY
NERVOUS REGULATIONREGULATING AND
RESPONDING TO CHANGES REQUIRES THE COORDINATION OF EVERY BODY SYSTEM…BUT THE MAJOR ONES TO CONSIDER ARE THE: MUSCULOSKELETAL CHECK NERVOUS CARRY
MESSAGES ENDOCRINE CHEMICAL
MESSAGES
NERVOUS REGULATIONHOW DOES THE NERVOUS SYSTEM WORK?
THE PATHWAY OF A MESSAGESTIMULUS RECEPTOR IMPULSE EFFECTOR RESPONSE
DEFINITIONS?STIMULUSRECEPTORIMPULSEEFFECTORRESPONSE
NERVOUS REGULATIONREVIEW QUESTIONS:
FUNCTIONAL UNITS OF:LUNGS ??KIDNEYS ??NERVOUS SYSTEM ??
NEURONS!!!
WHAT’S THE TRICK TO KNOWING HOW SOMETHING FUNCTIONS?
NERVOUS REGULATIONNEURONS
NERVOUS REGULATIONNEURONS
CELL BODY DENDRITES AXON SCHWANN CELLS MYELIN SHEATH TERMINAL BRANCHES
TYPES OF NEURONS SENSORY INTERNEURON MOTOR NEURON
NERVOUS REGULATIONHOW DO NEURONS FIT INTO THE MESSAGE
PATHWAY?STIMULUS RECEPTOR IMPULSE EFFECTOR RESPONSE
NERVOUS REGULATION IMPORTANT TO NOTE THAT ADJACENT NEURONS NEVER
ACTUALLY TOUCH!! INSTEAD THERE IS ASYNAPSE!!! THE GAP, OR SPACE,
BETWEEN ADJACENTNEURONS
THE MESSAGE MUST BEABLE TO CROSS THIS GAP!!
WE WILL COME BACK TO THIS SHORTLY!!
NERVOUS REGULATIONUNDERSTANDING THE MESSAGE,
OR IMPULSE, INVOLVED IN NERVOUS SYSTEM COMMUNICATION IS VERY, VERY, VERY, VERY, VERY, VERY, VERY, VERY, VERY, VERY, VERY, VERY, VERY, VERY, VERY, VERY, VERY, VERY, VERY, VERY, VERY, VERY, VERY, VERY, VERY, VERY, VERY, VERY, VERY, VERY, VERY, VERY COMPLEX!!
NERVOUS REGULATIONTHE NERVE IMPULSE IN SIMPLE
TERMS:A STIMULUS CHANGES THE
PERMEABILITY OF THE CELL MEMBRANE, WHICH THEN ALLOWS SODIUM AND POTASSIUM TO CHANGE SIDES WITH REGARD TO THE MEMBRANE, CHANGING THE RELATIVE “CHARGE”…CREATING AN ELECTRICAL SIGNAL THAT TRAVELS DOWN THE CELL
NERVOUS REGULATIONSOME COOL STUFF ABOUT NERVOUS SYSTEM
IMPULSESTHRESHOLDS
REFRACTORY PERIODS
NEUROTRANSMITTERS
DRUGS!!
NERVOUS REGULATION
NERVOUS REGULATIONNERVOUS REGULATION IN PROTISTS
NERVOUS REGULATIONNERVOUS REGULATION IN HYDRAS
CELLS ARE ALLLINKED TOGETHERFORMING A “NERVE NET”
NO FORMAL SYSTEM
NERVOUS REGULATIONNERVOUS REGULATION IN EARTHWORMS
CENTRAL VS.PERIPHERALNERVOUSSYSTEM
GANGLIAMULTIPLE
NERVE CELLSTHAT FUNCTIONSIMILAR TO A BRAIN
NERVOUS REGULATIONNERVOUS REGULATION IN GRASSHOPPERS
SIMILAR TO EARTHWORM INCORPORATES SOME MORE SPECIAL SENSE
ORGANS (EYES, ANTENNAE)
NERVOUS REGULATIONLET’S GET TO THE GOOD STUFF!!
WHAT ABOUT HUMAN BRAINS?!?!?CHAPTER 15, HUMAN NERVOUS SYSTEM…HERE
WE COME