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Chapter 4: Q9E (page 842)

BIO Transmission of Nerve Impulses. 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 5.6脳1011Na+ions enter each meter of the

axon during a time of . What is the current during this inflow of charge

in a meter of axon?

Short Answer

Expert verified

The current during the inflow of charge in a meter of axon is9渭A.

Step by step solution

01

Define the current.

The charge per unit time is known as the current .

I=Qt

Here, I is current in ampereA, Q is charge in Columbus Cand t is time in sec

02

Determine current and direction of current.

Determine the current between the two electrodes as:

I=NQt=NumberofNa+脳qt

Substitute the values and solve as,

I=5脳1011脳-1.6脳脳10-1910脳10-3=8.96渭A鈮�9渭A

Hence, current during the inflow of charge in a meter of axon is 8.96 渭A.

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