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Ion pumps, a type of transmembrane proteins, use metabolic energy to transport ions against their concentration gradients across the membrane.

Without ion pumps, no ionic concentration gradients would be established or maintained, and no resting membrane potential would exist.

Which of the following is FALSE about ion pumps?


The sodium-potassium pumps utilize near 70% of ATP used by the brain.


The sodium-potassium pumps can be blocked by ouabain, a plant-derived toxin.


The calcium pumps make sure that calcium is more concentrated inside the neurons than outside.


The ion pumps work much slower than the ion channels because it takes time for them to bind and unbind ions.

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