What is the primary factor that determines the resting membrane potential in a nerve fiber?
AIs equal to the resting potential of cardiac muscle fibers.
BCan be accurately measured using intracellular electrodes.
CIncreases with elevated extracellular potassium concentration.
DIs primarily determined by the equilibrium potential of potassium ions.
What is the physiological condition in which the ratio of potassium permeability to sodium permeability (PK/PNa) is maximized?
ADepolarization
BAction Potential
CResting Membrane Potential
DHyperpolarization
Which of the following statements about the Na-K pump is false?
AIt is not directly involved in the generation of action potentials.
BIt is electrogenic
CIt needs ATP for its functioning
DIt is located on the apical membrane of cell
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