12. Which of the following statements is true regarding ion channels? A) Protein

Question

12. Which of the following statements is true regarding ion channels? A) Protein structure studies indicate a flexible pore size capable of transporting ions of varying size. B) Ions require waters of hydration for sufficient passage through the entire channel. C) Ion channels maintain sodium and potassium ion concentrations that are greater in the extracellular fluid than in the cytosol. D) Channel rigidity minimizes energy states for appropriately sized ions. E) None of the above is true regarding ion channels.

Explanation / Answer

12. A. Protein structure studies indicate a flexible pore size capable of tansporting ions of varying size.

Ion channels are structurally not rigid. They are the flexible proteinious structures that allow particular ions to move through (they change accordingly to accommodate the flow of ions).

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