What is produced when depolarization of a cell membrane reaches threshold?Multiple ChoiceA new action potential is produced.Membrane receptors are exposed.The absolute refractory period ends.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

A recently depolarized area of a cell membrane cannot generate an action potential because of theMultiple Choiceabsolute refractory period.high concentration of sodium ions in the extracellular fluid.the high concentration of potassium ions in the cytoplasm.presence of receptor sites on the membrane.