Question 1

If one ion carried a greater quantity of charge than another, then the electrical driving force for the ion with the greater quantity of charge would (increase/decrease).

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Question 2

Assuming that for Na⁺(higher concentration outside cell), E_Na⁺= +60 mV and V_mis -70 mV, the electrochemical gradient is directed (into the cell/out of the cell).

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Question 3

As the magnitude of charge difference across the membrane increases, the magnitude of the electrical driving force would (increase/decrease) across that membrane.

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Question 4

If glucose molecules outside a cell have higher energy than those inside the cell, then those molecules would move (into/out of) the cells.

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Question 5

-During cotransport with sodium ions, glucose is (actively/passively) transported into the cell by the concentration gradient established through the Na⁺/K⁺pump.

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-During cotransport with sodium ions, glucose is...

Question 6

When comparing the molecular energies of two different concentrations of the same molecule, the one with the (higher concentration/lower concentration) would have the higher energy.

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Question 7

With a concentration of 10 mM glucose and 5 mM K⁺on the outside of the membrane and 1 mM glucose and 140 mM K⁺on the inside, the glucose would move (into/out of) the cells if the membrane is permeable to glucose.

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Question 8

If the solutions on either side of the membrane have an unequal distribution of charged ions with the inside having an excess of anions, then the inside of the cell would be (negative/positive) relative to the outside.

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Question 9

Assuming that for K⁺(higher concentration inside cell), E_K⁺= -90 mV and V_mis -70 mV, the (electrical gradient/chemical gradient) is larger in magnitude.

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Question 10

-Does the graph in Figure 4.1 represent simple diffusion, facilitated diffusion, or both?

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-Does the graph in Figure 4.1 represent...

Question 11

If the concentration of sodium in the extracellular fluid increased, then the equilibrium potential would (become more positive/become less positive/remain the same).

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Quiz 4: Cell Membrane Transport