Question

Bending of cilia in response to basilar membrane vibration produces a change in K⁺ conductance of the hair cell. Bending in one direction causes depolarization, while bending in the other direction causes hyperpolarization. What is the effect of Ca₂⁺ entering the hair cell?

1) It causes an increase in K⁺ conductance
2) It causes depolarization
3) It causes hyperpolarization
4) It causes neurotransmitter release

Answer 1

When sound waves cause the basilar membrane to vibrate, the bending of the hair cell's stereocilia leads to depolarization or hyperpolarization. The effect of Ca²⁺ entering the hair cell is not mentioned in the information provided.

Step-by-step explanation:

When sound waves cause the basilar membrane in the cochlea to vibrate, the stereocilia in the hair cells also bend. This bending of the stereocilia leads to a change in the hair cell's ion channels. Bending in one direction causes depolarization, while bending in the other direction causes hyperpolarization. The entry of Ca²⁺ ions into the hair cell is not mentioned in the given information, so we cannot determine its effect based on the provided context.