Lorenzo Odone , ALD

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Lorenzo Odone , ALD
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Nervous System

• Central Nervous System
• Peripheral Nervous System

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• Nerve Cells

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Types of Cells in the CNS
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(a) Microglial cells support other nerve cells
by phagocytizing debris.
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(b) Oligodendrocyte cells form myelin (like
schwann cells but no neurilemmal sheaths).
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(c) Astrocytes hold nerve cells together and
help regulate ion concentration.
My diet example.
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(d) Ependymal cells create a lining that
covers specialized brain parts.
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Neural Transmission in the Brain

• http//www.youtube.com/watch?v90cj4NX87Yk

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Action Potential
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Resting Potential
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Action Potential

• Sodium channels open and sodium (Na) floods into
  the cell.
• Potassium channels open and potassium (K) begins
  to leave the cell.
• Sodium equilibrates.
• Excess potassium leaves the cell.
• Potassium channels close.
• Resting Potential is restored.

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http//shp.by.ru/spravka/neurosci/synapse.gif
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Transmission of Nerve Signals

• http//www.youtube.com/watch?vjcZLtH-Uv8M

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Benefits of Myelin

• http//www.youtube.com/watch?vDJe3_3XsBOg

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Nerve Synapse (junction)
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Homework

• Old Book Read 199 to 219 and answer all
  questions within the reading.
• New Book Read pages 205 to 225 and answer all
  questions within the reading.

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Synapse

• http//www.youtube.com/watch?vHXx9qlJetSU

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Knee Jerk Reflex Arc
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http//content.answers.com/main/content/img/oxford
/Oxford_Sports/0199210896.reflex-arc.1.jpg
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Biceps Reflex Arc
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Biceps Triceps Reflex Arc
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Ankle Reflex Arc
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