The Nervous System - Ms. Murray's Biology...THE NERVOUS SYSTEM Function(job): helps control all of...
Transcript of The Nervous System - Ms. Murray's Biology...THE NERVOUS SYSTEM Function(job): helps control all of...
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THE NERVOUS SYSTEM
Function(job): helps control all of your
body’s functions, using electrical
impulses.
•Controls and coordinates functions in the body.
•Responds to internal and external stimuli.
•Includes:
•Brain
•Spinal Cord
•Neurons (nerve cells)
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THE NERVOUS SYSTEM HELPS CONTROL ALL OF YOUR BODY’S FUNCTIONS USING ELECTRICAL SIGNALS CALLED IMPULSES.
• YOUR BRAIN CONTROLS:
• movement (muscular system)
• bodily functions (like breathing
and digestive system)
• sensory functions (like touch,
hearing, vision and balance)
• sensations such as pain,
feelings, thoughts and
memories.
THE NERVOUS SYSTEM
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NERVOUS SYSTEM WORKS WITH
OTHER BODY SYSTEMS
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THE NERVOUS SYSTEM
Central Nervous System is made up
of the brain and the spinal cord.
Neurons: the cells that make up
your nervous system.
• Large cell body
• Extensions from cell body
(dendrites)
• Axon (trunk)
Sensory neurons carry electrical
impulses from muscles and organs
to the brain.
Motor neurons carry electrical
impulses from the brain to muscles
and organs.
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THE NERVOUS SYSTEM
The neuron.
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NEURON
Label the neuron:
• Axon
• Dendrites
• Terminal buttons
• Nucleus
• Myelin Sheath
• Cell body/soma
• Node of Ranvier
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• Neurons communicate with each other through a signal called a synapse.
• Synapse: when one neuron releases chemicals (called neurotransmitters) that are absorbed by another connected neuron.
• These neurotransmitters carry electrochemical impulses!
HOW DO NEURONS COMMUNICATE?
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ELECTROCHEMICAL IMPULSES
• Electrochemical impulses travel along neurons to give your body instructions and send signals to your brain!
• Your nerves and brain are made up of many neurons that communicate with one another by sending these impulses
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EXAMPLES OF THE NERVOUS SYSTEM
AT WORK
You hear the phone ring (sensory neurons)
& pick it up (motor neurons)
You touch a hot pot & remove your hand
from it
When you step on a thumb tack or nail, you
lift your leg
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THE NERVOUS SYSTEM
Function(job): helps control all of your
body’s functions, using electrical
impulses.
•________________________ functions in the body.
•Responds to ____________ _______________________.
•Includes:
•Brain
•Spinal Cord
•Neurons (nerve cells)
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THE NERVOUS SYSTEM HELPS CONTROL ALL OF YOUR BODY’S FUNCTIONS ________________ __________________________.
• YOUR BRAIN CONTROLS:
• movement (muscular system)
• bodily functions (like breathing
and digestive system)
• sensory functions (like touch,
hearing, vision and balance)
• sensations such as pain,
feelings, thoughts and
memories.
THE NERVOUS SYSTEM
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NERVOUS SYSTEM WORKS WITH
OTHER BODY SYSTEMS
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THE NERVOUS SYSTEM
_____________________________
is made up of ______________
and the ___________________.
Neurons: the cells that make up
your nervous system.
• Large cell body
• Extensions from cell body
(dendrites)
• Axon (trunk)
___________________carry electrical
impulses from muscles and organs
_________________.
___________________carry electrical
impulses ____________ to muscles
and organs.
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THE NERVOUS SYSTEM
The neuron.
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NEURON
Label the neuron:
• Axon
• Dendrites
• Terminal buttons
• Nucleus
• Myelin Sheath
• Cell body/soma
• Node of Ranvier
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• __________________ _______________through a signal called a synapse.
• Synapse: when ________ _____________________ (called neurotransmitters) that are ____________ ______ connected neuron.
• _____________________ _____________________ _____________________!
HOW DO NEURONS COMMUNICATE?
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ELECTROCHEMICAL IMPULSES
• Electrochemical impulses ______________________ __________________ and send signals to your brain!
• Your nerves and brain are made up of many neurons __________________________ by sending these impulses
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EXAMPLES OF THE NERVOUS SYSTEM
AT WORK
You hear the phone ring (sensory neurons)
& pick it up (motor neurons)
You touch a hot pot & remove your hand
from it
When you step on a thumb tack or nail, you
lift your leg