You Insert a Microelectrode into the Axon of a Neuron

question 58

Multiple Choice

You insert a microelectrode into the axon of a neuron and inject positive current while also measuring the membrane potential at a distance of TWO length constants from the site of current injection.If the neuron does not reach its threshold,this voltage measurement will be about

• A)1/3 of the value at the injection site.
• B)2/3 of the value at the injection site.
• C)1/9 of the value at the injection site.
• D)the same as the value at the injection site.

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Definitions:

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