Nerve cells transmit electric signals through their long tubular axons. These signals propagate due to a sudden rush of Na+ ions, each with

Question

Nerve cells transmit electric signals through their long tubular axons. These signals propagate due to a sudden rush of Na+ ions, each with charge +e, into the axon. Measurements have revealed that typically about 5.60×10^11 Na+ ions enter each meter of the axon during a time of 10.0 ms . What is the current during this inflow of charge in a meter of axon?

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Thạch Thảo 5 years 2021-08-05T18:10:31+00:00 1 Answers 224 views 0

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  1. thuthuy
    0
    2021-08-05T18:11:39+00:00
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    Answer:

    The current during this inflow of charge in a meter of axon is 8.96\ \mu A

    Explanation:

    Given that,

    Number of sodium ions N=5.6\times 10^{11}

    Time, t = 10 ms

    Let q is the charge flowing through nerve axon. It is given by :

    q=ne\\\\q=5.6\times 10^{11}\times 1.6\times 10^{-19}\\\\q=8.96\times 10^{-8}\ C

    The electric charge per unit time is called electric current. it is given by :

    I=\dfrac{q}{t}\\\\I=\dfrac{8.96\times 10^{-8}}{10\times 10^{-3}}\\\\I=8.96\times 10^{-6}\ A\\\\I=8.96\ \mu A

    So, the current during this inflow of charge in a meter of axon is 8.96\ \mu A

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