A graph of an action potential is presented at right. When an axon is not conduc

Question

A graph of an action potential is presented at right. When an axon is not conducting an impulse, the membrane potential is equal to around - 65 m, indicating that the inside of the neuron is more negative than the outside. What is the total membrane potential of the impulse propagated by the neuron depicted in the graph? minus 100 mV minus 80 mV 20 mV 100 mV 80 mV Quantitatively, the usual resting membrane potential of minus 60 millivolts is close to but lower in magnitude than the calculated potassium equilibrium potential. What is the best explanation for this difference between K + equilibrium potential and the resting membrane potential? open Ca^2+ channels allow the net inward flow of Na ions making it more positive open CL^- channels allow the net inward flow of Cl^- ions making it more negative open Na^+ channels allow the net inward flow of Na^+ ions making it more positive open K^+ channels allow the net inward flow of Na^+ ions making it less positive

Explanation / Answer

ANS:

65) minus 80 mV (b)

66) Open K+ channels allows the net inward flow of Na+ ions making it less positive (d)

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