[solved] IB biology past paper

Hi, can anyone help me with this question? Why is C wrong? Is it wrong because Na+/K+ can’t be transported via diffusion mechanism but sodium-potassium pump
instead?
The answer is A, thank you!!!

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hello!
tricky wording, the sodium and potassium go in and out yes but it is as you said via the pump. so saying by diffusion would be wrong

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hello, so C is wrong because Na+/K+ can only be transported by pump, right?
thank you!!

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yes! they cannot diffuse that much into the bilipid membrane

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thank you so muchhh! have a great day!!

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could you mark the question answer as solution so that the topic closes? thank you

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