2015 Nervous System PPT.pptx - The Nervous System The Nervous System Crash Course(12:03 Functions of the Nervous System React to outside stimuli

2015 Nervous System PPT.pptx - The Nervous System The...

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The Nervous System The Nervous System Crash Course (12 :03)
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Functions of the Nervous System React to outside stimuli Controls activities of body’s vital organs
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2 Divisions (CNS) Central Nervous System a. brain b. spine (PNS) Peripheral Nervous System a. nerves that carry impulses from body to brain and spine (senses)
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Neuron Anatomy
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Neurons (nerve cells) Basic unit of function for nervous system; it quickly transmits messages Consist of 4 parts: Dendrites- Receive impulses and conducts them towards the cell body. Axon- Carry impulses away from the cell body towards another nerve or muscle cell. Cell body- Connects dendrite to axon, location of cell nucleus Axon terminal- Releases neurotransmitters into synapse
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Neurons – part of nervous system that can send signals Sensory Neurons – Carry impulses from body to spine and brain ( From shoulder someone is tapping me ) Interneurons – Found in spine and brain. Process impulse and pass response to motor neurons ( Within brain - decides what to do – we need to turn around and see ) Motor Neurons – Activate muscles and movement ( From brain contract neck muscle, turn around and see who it is )
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Resting Neuron (Polarized) Na = Sodium K = Potassium In a resting state, which Ion is more abundant and located on the outside? _______________ Sodium The Sodium / Potassium pump is an active transport set of proteins that moves ions
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  • Fall '15
  • motor neurons, Dendrites- Receive impulses

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