During the endocochlear potential, depolarization occurs because of an outflow of Ca++ and K+ from the hair cell.Group of answer choicesTrueFalse

Depolarization occurs becauseMultiple Choicethe extra efflux of potassium ions causes the membrane potential to become slightly more positive than the resting value.more sodium ions diffuse into the cell than potassium ions diffuse out of it.the inactivation gates of the voltage-gated sodium ion channels begin to open, and the diffusion of sodium ions decreases.potassium ions continue to diffuse out of the cell after the inactivation gates of the voltage-gated sodium ion channels begin to close.the increased potassium ion permeability lasts slightly longer than the time required to bring the membrane potential back to its resting level.

What is produced when depolarization of a cell membrane reaches threshold?Multiple ChoiceA new action potential is produced.The absolute refractory period ends.Voltage-gated ion channels close.An existing action potential is stopped.

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

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

What is Deiter’s cells?Auditory receptor neuronsTransmit vibrations from tympanic membrane to incusTransmit vibrations from incus to cochlea via oval windowSupport hair cells, anchor hair cells to the basilar membraneSnail – shaped structure filled with fluid