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# BIO Electric Field of Axons. A nerve signal is transmitted

ISBN: 9780321675460 31

## Solution for problem 48E Chapter 21

University Physics | 13th Edition

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University Physics | 13th Edition

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Problem 48E

BIO Electric Field of Axons. A nerve signal is transmitted through a neuron when an excess of Na + ions suddenly enters the axon, a long cylindrical part of the neuron. Axons are approximately 10.0 µm in diameter, and measurements show that about 5.6 X 1011 Na+ ions per meter (each of charge +e) enter during this process. Although the axon is a long cylinder, the charge does not all enter everywhere at the same time. A plausible model would be a series of point charges moving along the axon. Consider a 0.10-mm length of the axon and model it as a point charge. (a) If the charge that enters each meter of the axon gets distributed uniformly along it, how many coulombs of charge enter a 0.10-mm length of the axon? (b) What electric field (magnitude and direction) does the sudden influx of charge produce at the surface of the body if the axon is 5.00 cm below the skin? (c) Certain sharks can respond to electric fields as weak as 1.0 µN/C. How far from this segment of axon could a shark be and still detect its electric field?

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##### ISBN: 9780321675460

The full step-by-step solution to problem: 48E from chapter: 21 was answered by , our top Physics solution expert on 05/06/17, 06:07PM. Since the solution to 48E from 21 chapter was answered, more than 592 students have viewed the full step-by-step answer. This textbook survival guide was created for the textbook: University Physics, edition: 13. This full solution covers the following key subjects: axon, Charge, electric, enter, Field. This expansive textbook survival guide covers 26 chapters, and 2929 solutions. University Physics was written by and is associated to the ISBN: 9780321675460. The answer to “BIO Electric Field of Axons. A nerve signal is transmitted through a neuron when an excess of Na + ions suddenly enters the axon, a long cylindrical part of the neuron. Axons are approximately 10.0 µm in diameter, and measurements show that about 5.6 X 1011 Na+ ions per meter (each of charge +e) enter during this process. Although the axon is a long cylinder, the charge does not all enter everywhere at the same time. A plausible model would be a series of point charges moving along the axon. Consider a 0.10-mm length of the axon and model it as a point charge. (a) If the charge that enters each meter of the axon gets distributed uniformly along it, how many coulombs of charge enter a 0.10-mm length of the axon? (b) What electric field (magnitude and direction) does the sudden influx of charge produce at the surface of the body if the axon is 5.00 cm below the skin? (c) Certain sharks can respond to electric fields as weak as 1.0 µN/C. How far from this segment of axon could a shark be and still detect its electric field?” is broken down into a number of easy to follow steps, and 191 words.

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