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Unformatted text preview: synapse consists of many channels that make the cell membrane permeable or ions to deliver messages. Each channel contains twelve membrane proteins call connexins that convey signals directly. In a chemical synapse, neurotransmitter chemicals carry signals between cells. By omitting neurotransmitters, electrical synapses conduct impulses from one neuron to the next at far higher speeds. Chemical synapses secrete neurotransmitters, which must cross the synaptic gap to deliver their message. The entire process takes about half a millisecond. That may seem fast, but for many physiological processes it would be too slow for survival....
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- Spring '09