Synaptic Activity

Synaptic Activity - Synaptic Activity Nerve impulse Action...

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Synaptic Activity Nerve impulse • Action potential travels along an axon • Information passes from presynaptic neuron to postsynaptic cell General properties of synapses • Electrical • Rare • Pre- and postsynaptic cells are bound by interlocking membrane proteins General properties of synapses • Chemical synapses • More common • Excitatory neurotransmitters cause depolarization and promote action potential generation • Inhibitory neurotransmitters cause hyperpolarization and suppress action potentials Cholinergic synapses • Release acetylcholine (ACh) • Information flows across synaptic cleft • Synaptic delay occurs as calcium influx and neurotransmitter release take appreciable amounts of time • ACh broken down • Choline reabsorbed by presynaptic neurons and recycled • Synaptic fatigue occurs when stores of ACh are exhausted Other neurotransmitters • Adrenergic synapses release norepinephrine (NE)
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This note was uploaded on 11/22/2011 for the course BSC BSC1085 taught by Professor Sharonsimpson during the Fall '10 term at Broward College.

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Synaptic Activity - Synaptic Activity Nerve impulse Action...

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