Nervous co-ordination

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Nervous co-ordination
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Objectives - CNS

• Describe the gross structure of the whole brain
  and spinal cord.
• Location and function of the
• Medulla oblongata
• Cerebellum
• Cerebral hemispheres
• Hypothalamus.
• Describe the functioning of the spinal reflex.

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Structure of the brain and spinal cord
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Structure and function
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Spinal reflex
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Objectives nervous co-ordination in mammals.

• Appreciate the difference between nerves and
  hormones.
• Structure and function of different neurones.
• Understand nerve impulses and action potentials.
• Structure and function of a synapse.
• Understand the effect of drugs.

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structure

• Myelination
• http//www.sensory-systems.ethz.ch/MultiMedia/acti
  onp.swf

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Types of neurones
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Synapse http//www.bishopstopford.com/faculties/s
cience/arthur/synapse.swf
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Depolarisation

• Cartoon of the whole process.
• http//www.brainu.org/action_potential_cartoon.swf
  
• Shows the wave action.
• http//schools.tdsb.on.ca/rhking/departments/scien
  ce/bio/homeostasis/nervous_system/action.mov
• Short clip of depolriation.
• http//instruct.uwo.ca/biology/022/unit3/48-09-Act
  ionPotential.mov

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Drugs

• Caffeine
• Nicotine
• Opiates

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Quiz

1. What structures make up the central nervous
   system?
2. What does the medulla oblongata do?
3. Where do you find cell bodies in the spinal cord?
4. Name 4 main structures of a nerve.
5. Which ion initiates the release of a
   neurotransmitter?
6. Name 1 neurotransmitter?
7. What happens in an action potential when K
   channels open?
8. What effect does opiates have?