The channel pore of the nicotinic acetylcholine receptor is permeable to both Na+ and K+. The relative pK : pNa permeability of the selectivity filter is:

Physiology Test Question

The channel pore of the nicotinic acetylcholine receptor is permeable to both Na⁺ and K⁺. The relative p_K : p_Na permeability of the selectivity filter is:

	(A) 1 : 1 (the channel pore is equally permeable to Na⁺ and K⁺)
	(B) 1 : 2 (the channel pore permeability to Na⁺ is greater than the permeability to K⁺)
	(C) 1 : 0.5 (the channel pore permeability to K⁺ is greater than the permeability to Na⁺)
	(D) 1 : 10 (the channel pore permeability to Na⁺ is significantly greater than the permeability to K⁺)
	(E) 1 : 0.1 (the channel pore permeability to K⁺ is significantly greater than the permeability to Na⁺)

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