Assume that in a neuron, the plasma membrane permeability values for potassium (K+), sodium (Na+), and Cl- are the following: pK = 1, pNa = 12, and pCl = 0.5.Based on physiological concentrations of K+, Na+, and Cl- (see here), determine the membrane potential in this neuron.

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Physiology Test Question

Assume that in a neuron, the plasma membrane permeability values for potassium (K⁺), sodium (Na⁺), and Cl⁻ are the following: p_K = 1, p_Na = 12, and p_Cl = 0.5.

Based on physiological concentrations of K⁺, Na⁺, and Cl⁻ (see here), determine the membrane potential in this neuron.

	(A) −40 mV
	(B) +40 mV
	(C) 0 mV
	(D) −70 mV
	(E) −90 mV

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Posted: Wednesday, July 16, 2014
Last updated: Wednesday, August 13, 2014