tem 5 5 of 13 Constants Part A Neurons are components of the nervous system of t

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tem 5 5 of 13 Constants Part A Neurons are components of the nervous system of the body that transmit signals as electrical impulses travel along their length. These impulses propagate when charge suddenly rushes into and then out of a part of the neuron called an axon. Measurements have shown that, during the inflow part of this cycle approximately 5.60×1011 Na+ (sodium ions) per meter, each with charge +e, enter the axon. How many coulombs of charge enter a 1.40 cm length of the axon during this process? Q 8.96 nC Submit Previous Answers Request Answer X Incorrect: Try Again; 3 attempts remaining Provide Feedback

Explanation / Answer

Charge on one proton = +e = 1.6*10^-19 C

Length of axon = 1.40 cm = 0.014 m

Na+ ions = 5.6*10^11

Charge on 1 Na+ = 1 proton

Charge per meter of Na+ will be = 1*5.6*10^11*1.6*10^-19 = 8.96*10^-8 C

Charge on 0.014 m axon will be = 0.014*8.96*10^-8 = 1.25*10^-9 C = 1.25 nC

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