Nervous co-ordination
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.
Structure of the brain and spinal cord
Structure and function
Spinal reflex
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.
structure
• Myelination• http://www.sensory-systems.ethz.ch/MultiMedia/actionp.swf
Types of neurones
Synapse http://www.bishopstopford.com/faculties/science/arthur/synapse.swf
DepolarisationCartoon of the whole process.• http://www.brainu.org/actio
n_potential_cartoon.swf
Shows the wave action.• http://schools.tdsb.on.ca/rh
king/departments/science/bio/homeostasis/nervous_system/action.mov
Short clip of depolriation.• http://instruct.uwo.ca/biolog
y/022/unit3/48-09-ActionPotential.mov
Drugs
• Caffeine
• Nicotine
• Opiates
Quiz1. 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?
Top Related