chap 11-13

How do Neurons Communincate with each other?

• Axons

• Neurotransmitters & impulses

• Touching each other

Example of neurotransmitters

• Acetylcholine

• Dopamine

• Ligase

What is most likely to happen if a post-synaptic neuron is depolarized? Hyperolarized?

• Depolarized- becomes more positive, action pot more likely

  Hyperpolarized- becomes very negative, action pot less likely

• Depolarized- becomes more negative, action pot less likely

  Hyperpolarized- becomes very positive, action pot more likely

Organization of nervous system:

• CNS (brain & spinal)

  PNS (nerves)

• CNS (nerves)

  PNS (brain & spinal)

Cell body?

• Axon terminals

• Neurotransmitter

• Contains cytoplasm, most organelles

• Conducts impulses

Dendrites

• cell body

• received & sends impulses to cell body

• Used neurons

• synaptic vesicle

axon

• conducts impulses away from cell body to synapse

• delivers impulses

axon terminal

• contains cytoplasm

• synaptic vesicles with neurotransmitters

structural classification of neurons

• multipolar, bipolar, unipolar

• sensory, motor, interneurons

functional classification of neurons

• multipolar, bipolar, unipolar

• sensory, interneurons, motor