What is produced when depolarization of a cell membrane reaches threshold?Multiple ChoiceThe absolute refractory period ends.Membrane receptors are exposed.A new action potential is produced.An existing action potential is stopped.

Depolarization of a cell membrane occurs because

Depolarization of the cell membrane occurs when there is a rapid influx (inflow) ofMultiple Choicecalcium ions.amino acids.sodium ions.potassium ions.chloride ions.

Which event occurs during neuronal depolarization? a. membrane potential returns to normal b. cations leave the cytosol c. membrane potential remains stable d. membrane potential decreases e. plasma membrane becomes less permeable

Depolarization is initiated by a stimulus that makes the membrane potentialMultiple ChoiceUnchangedNeutralMore positiveMore negative

Depolarization of a cell membrane occurs becauseMultiple ChoiceSodium ions are blocked from entering the cellMore sodium ions diffuse into the cell than potassium ions diffuse out of itThe concentration of sodium and potassium ions in the extracellular fluid is at equilibriumThe concentration of sodium and potassium ions in the cell is at equilibrium