Nervous%20System1

Nervous%20System1 - Human Anatomy and Physiology 1110...

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Human Anatomy and  Physiology 1110 Nervous System
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1.Explain the structural and functional divisions of  the nervous system. 2.Define neuron, describe its important structural   components, and relate each to a functional role. 3.Explain the importance of the myelin sheath and  describe how it is formed in the central and  peripheral nervous system. 4.Define resting membrane potential and describe  its electrochemical basis. 5.Explain how action potentials are generated and  propagated along neurons.  Nervous System: Learning Objectives
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1. Sensory input.  Monitor internal and  external stimuli 2. Integration . Brain and spinal cord  process sensory input and initiate  responses 3. Control  of muscles and glands 4. Homeostasis . Regulate and coordinate  physiology 5. Mental activity . Consciousness,  thinking, memory, emotion Nervous System: Functions
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Nervous System: Organization - CNS and PNS
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Nervous System: Organization
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Sensory receptors : ending of neurons or  separate, specialized cells that detect such  things as temperature, pain, touch, pressure,  light, sound, odors Nerve : a bundle of axons and their sheaths that  connects CNS to sensory receptors, muscles,  and glands Cranial nerves : originate from the brain; 12 pairs Spinal nerves : originate from spinal cord; 31 pairs Ganglion : collection of neuron cell bodies  outside CNS Plexus : extensive network of axons, and  sometimes neuron cell bodies, located outside  Nervous System: Peripheral Nervous System (PNS)
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Nervous System: Peripheral Nervous System (PNS)
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Nervous System: Peripheral Nervous System (PNS)
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Nervous System: Peripheral Nervous System (PNS)
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Neurons  or nerve cells  receive stimuli and  transmit action potentials Organization Cell body  or soma Dendrites : input Axons : output Glial cells  or neuroglia Support and protect  neurons Nervous System: Cells of the Nervous System
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Cell Body - nucleus, Nissl substance Nissl substance = chromatophilic  substance = rough E.R: primary  site of protein synthesis. Dendrites - short, often highly 
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This note was uploaded on 04/15/2011 for the course BIOL 1110K taught by Professor Kylaross during the Fall '10 term at Georgia State.

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Nervous%20System1 - Human Anatomy and Physiology 1110...

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