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PSL 425 FINAL EXAM MULTIPLE CHOICE|
COMPREHENSIVE Q&A FOR
CERTIFICATION SUCCESS 2026
Which of the following values is unnecessary when finding the equilibrium
potential of an ion using the Nernst equation? - correct-answer - The membrane
voltage
What does the Nernst equation predict for any concentration gradient of a
particular ion across a membrane? - correct-answer - The equilibrium potential
If movement of a substance across the membrane is not directly coupled to the
movement of any other solute or to any other chemical reaction, this transport is
called? - correct-answer - Noncoupled transport
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How is the net flux best determined in terms of influx and efflux? - correct-answer
- The sum of influx and efflux
What direction will an anion move when the net driving force is negative? -
correct-answer - The anion will exit the cell
What direction will a cation move when the net driving force is negative? -
correct-answer - The cation will enter the cell
For equilibrium to occur what must happen? - correct-answer - The net flux must
be zero
Which answer correctly orders the Nernst potentials of a neuron at 37°C for
potassium, sodium, calcium, chloride from depolarized to hyperpolarized? -
correct-answer - Ca2+ > Na+ > Cl- > K+
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The resting membrane potential is mainly determined by: - correct-answer - The
potassium gradient
What is the name for the movement of a single ion species through the
membrane? - correct-answer - Current
What does the rate of ion movement through the membrane depend on? -
correct-answer - The external and internal concentrations of the ion
The membrane potential
The permeability coefficient of the ion
The outward flow of Cl- would best be described as a(n): - correct-answer -
Inward current
PSL 425 FINAL EXAM MULTIPLE CHOICE|
COMPREHENSIVE Q&A FOR
CERTIFICATION SUCCESS 2026
Which of the following values is unnecessary when finding the equilibrium
potential of an ion using the Nernst equation? - correct-answer - The membrane
voltage
What does the Nernst equation predict for any concentration gradient of a
particular ion across a membrane? - correct-answer - The equilibrium potential
If movement of a substance across the membrane is not directly coupled to the
movement of any other solute or to any other chemical reaction, this transport is
called? - correct-answer - Noncoupled transport
,2|Page
How is the net flux best determined in terms of influx and efflux? - correct-answer
- The sum of influx and efflux
What direction will an anion move when the net driving force is negative? -
correct-answer - The anion will exit the cell
What direction will a cation move when the net driving force is negative? -
correct-answer - The cation will enter the cell
For equilibrium to occur what must happen? - correct-answer - The net flux must
be zero
Which answer correctly orders the Nernst potentials of a neuron at 37°C for
potassium, sodium, calcium, chloride from depolarized to hyperpolarized? -
correct-answer - Ca2+ > Na+ > Cl- > K+
, 3|Page
The resting membrane potential is mainly determined by: - correct-answer - The
potassium gradient
What is the name for the movement of a single ion species through the
membrane? - correct-answer - Current
What does the rate of ion movement through the membrane depend on? -
correct-answer - The external and internal concentrations of the ion
The membrane potential
The permeability coefficient of the ion
The outward flow of Cl- would best be described as a(n): - correct-answer -
Inward current
