Nervous_system_I_Lect_4

Nervous_system_I_Lect_4 - Nervous System Information flow...

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1 Nervous System Information flow Neurons Neural transmission Receive stimuli Transmit messages Integrate information Neural Signaling Process Efferent neuron transmission Control effector organs Figure 39 -2 Page 746 Dendrites Cell body Nucleus Axon Neuron – Basic Unit
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2 Three types of Neurons Stimulus Receptor Sensory neuron Interneuron (in CNS) Motor neuron (Efferent neuron) Effector organ Response (Afferent neuron) Sensory Interneurons Motor Glial cells Other Cells Astrocytes Schwann cells Nodes of Raniver internodes Myelin sheath
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3 Transmission of Nerve Impulse within a Neuron (electrochemical process) Resting state Action potential Repolarization Nerve Cell Signal What is an electrical current ? Movement of charge Electrons or Ions Passive Fast Resistance Nerve Cell signal Active Slower No resistance Nerve Cell (Neuron) Neuron can be in 1 of 3 phases 1. Resting 2. Action 3. Repolarization
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4 Resting Potential (Polarization) Figure 39 Figure 39 -4a
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This note was uploaded on 04/03/2008 for the course GB 102 taught by Professor Trans during the Spring '08 term at Rutgers.

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Nervous_system_I_Lect_4 - Nervous System Information flow...

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