Bio 256 2C

What Cells have action potentials?

All Cells
Increased speed of transmission
- increased diameter
- insulation
Where do voltage-gated channels exist on axons

nodes of ranvier
Saltatory conduction

action potential jump node to node
When is an excitatory postsynaptic potential (EPSP) created?

When neurotransmitter is taken up by the postsynaptic neuron
Removal of neurotransmitters occurs when they are:
- Degraded by enzymes
- reabsorbed by astrocytes or presynaptic terminals
Larger synapse

more vesicles diffusing and more receptors to receive neurotransmitter

Physical size of the syapse relates to the "strength" of the synapse
Catecholamines
- Dopamine
- norepinephrine
- epinephrine
Indolamines

seotonin and histamine
Serotonin
- CNS
- impacts emotions
Dopamine
- CNS
- Effects motor and Emotional
Excitatory neurotransmitters

Cause Depolarizations
Inhibitory neurotransmitters

Cause hyperpolarizations

Author

souimet05

203310

Card Set

Bio 256 2C

Description

2.11.13

Updated

2013-02-25T18:52:47Z

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