Assume Ions a and B Are Both Positively Charged

question 8

Multiple Choice

Assume ions A and B are both positively charged. Extracellular [A] is 10X intracellular [A]. The neuronal membrane is permeable only to ion B. After B is added to the extracellular solution, which of the following would you expect to be true?

• A) B would flow into the cell until it is found in equal concentrations on both sides of the membrane
• B) B would flow into the cell and A would flow out of the cell.
• C) B would flow into the cell until its equilibrium potential is reached
• D) B would not enter the cell

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Definitions:

Fixation

Arrested development at a psychosexual stage occurring because of excessive gratification or frustration at that stage.

Divergence

The act of moving away in different direction from a common point; in creativity and thinking, it refers to the generation of multiple solutions to a given problem.

Convergence

The process by which eyes adjust their angle so that the visual axes meet at the point of focus, or in a broader sense, the tendency for ideas and phenomena to evolve towards a common point.

Pupil

The opening in the center of the iris of the eye that regulates the amount of light that enters the eye to reach the retina.