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AnS214-Week 4- PART 2 - Lectures Fri

by: Megan Spiegel

AnS214-Week 4- PART 2 - Lectures Fri AnS 214

Marketplace > Iowa State University > Animal Science > AnS 214 > AnS214 Week 4 PART 2 Lectures Fri
Megan Spiegel
GPA 3.85

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About this Document

So this set of notes is a complete continuation of week 4. Week 4 was a little wonky in terms of uploading because of the exams. But have no fear! For it is finally here. Enjoy Happy Studying...
Domestic Animal Physiology
Dr. Adur
Class Notes
nervous system, CNS, PNS, AnS214, neurons, Diagrams, drawings, brain
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This 6 page Class Notes was uploaded by Megan Spiegel on Sunday September 18, 2016. The Class Notes belongs to AnS 214 at Iowa State University taught by Dr. Adur in Fall 2016. Since its upload, it has received 69 views. For similar materials see Domestic Animal Physiology in Animal Science at Iowa State University.


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Date Created: 09/18/16
  Organ System #3: N ​ ervous System   ❏Internal Coordination and Homeostasis         ❏Basic Functioning of the Nervous System  1. Sensory Input­ ​ deciphers message   2. Integration­ ​ ecides what to be done   3. Motor Output­​ does what was decided by the integration step             ❏CNS (Central Nervous System)             ❏Parasympathetic & Sympathetic: Functions of Nervous  System Diagram           ❏Brain Facts   ­ Majority of brain is water and fat (mushy)  ­ Meninges: connective tissue and protection for the brain   ­ CSF: cerebrospinal fluid   ❏ Grey Matter​ = cell bodies  ❏ White Matter​ = composed of all axons     ❏PNS (Peripheral Nervous System) Cranial Nerves      ❏Sensory Neuron         ❏Autonomic   ❏ Sympathetic­ ​  only in terms of Fight or Flight   ❏ Parasympathetic­ ​  does most of the work   → Autonomic Motor (association) Neurons   1. Smooth muscle   2. Cardiac muscle   3. Glands   ❏ A major part of the PNS     ❏Neuroglial Cells­ supports and maintains neurons   1. Astrocytes   2. Oligodendrocytes   3. Microglia  4. Epidermal Cells     ❏Neuron: Structural Unit of Nervous System   ­ Large; highly specialized cells   ­ Extreme longevity   ­ Amniotic­ does not actively divide  ­ High metabolic rate  ❏ 3 Responses   1. Excitability​­ ability to respond to stimuli   2. Conductivity­  ​ produce traveling electrical impulses   3. Secretion  ​ → ​terminal axon​ → ​chemical neurotransmitter secreted  into synapse                   ❏Types of Neurons: Basic Types       ❏3 Functional Classifications of Neurons   1. Sensory­​ afferent   2. Motor­​ association neurons   3. Interneuron­  ​ efferent     ❏Myelination   ❏ Cells wrap around an axon   ­ Acts as protective insulation   ❏ In CNS = Oligodendrocytes   ❏ In PNS = Schwann Cells   ­ Nodes of Ranvier:  ​ gaps in the myelination    


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