Nervous co-ordination

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?