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Refer to the Figure Below Showing Concentrations of Three Ions

Question 76

Multiple Choice

Refer to the figure below showing concentrations of three ions inside and outside a cell, as well as the direction of transport of each ion facilitated by a membrane protein. Refer to the figure below showing concentrations of three ions inside and outside a cell, as well as the direction of transport of each ion facilitated by a membrane protein.   Which ions are moved by active transport and why? A)  K<sup>+</sup> and Na<sup>+</sup>, because they are present in millimolar concentrations in the cell B)  Ca<sup>2+</sup>, because it is present in concentrations below the micromolar level in the cell C)  K<sup>+</sup>, because it is being moved into the cell and not out of the cell D)  K<sup>+</sup>, Na<sup>+</sup>, and Ca<sup>2+</sup>, because they are charged particles E)  K<sup>+</sup>, Na<sup>+</sup>, and Ca<sup>2+</sup>, because they are moving from lower to higher concentration Which ions are moved by active transport and why?


A) K+ and Na+, because they are present in millimolar concentrations in the cell
B) Ca2+, because it is present in concentrations below the micromolar level in the cell
C) K+, because it is being moved into the cell and not out of the cell
D) K+, Na+, and Ca2+, because they are charged particles
E) K+, Na+, and Ca2+, because they are moving from lower to higher concentration

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