Two neighboring neurons are at rest. Neuron A has a resting membrane potential of -80mV,Neuron B has a resting membrane potential of -70mV. Which is likely to be TRUE?
A)Neuron A has more K⁺ channels open than Neuron B.
B)Neuron B has more K⁺ channels open than Neuron A.
C)Neuron A has more Na⁺ channels open than Neuron B.
D)Neuron B has more Na⁺ channels open than Neuron A.
E)None of the answer choices are correct.

Question

Two neighboring neurons are at rest.  Neuron A has a resting membrane potential of -80mV,Neuron B has a resting membrane potential of -70mV. Which is likely to be TRUE?
A)Neuron A has more K⁺ channels open than Neuron B.
B)Neuron B has more K⁺ channels open than Neuron A.
C)Neuron A has more Na⁺ channels open than Neuron B.
D)Neuron B has more Na⁺ channels open than Neuron A.
E)None of the answer choices are correct.

Quizplus · Accepted Answer

Neuron A, with a more negative resting membrane potential, likely has more K⁺ channels open. This allows more potassium ions to exit the cell, making the inside more negative compared to Neuron B.

Two Neighboring Neurons Are at Rest