Explain how sounds of different frequencies are detected in the cochlea.

Video transcript

Hey, everyone. Let's take a look at this question together. What is the outcome of the hair cells bending against detector membrane? Is it answer choice. A basilar membrane vibrates answer choice B the attached nerve fibers depolarize. Answer choice C the bula closes or answer choice D the vibration becomes stronger. Let's work this problem out together to try to figure out which of the following answer choices is the outcome of the hair cells bending against the Tector membrane. So in order to solve this question, we have to recall what we have learned about the hair cells and the Tector membrane to determine which of the following is the outcome of those hair cells bending against the Tector membrane. And we can recall that when the hair cells bend against the Tector membrane, it leads to mechanical stimulation of the hair cells, which the mechanical stimulation of the hair cells causes the hair cells to depolarize and generate electrical signals of which those electrical signals are then transmitted through the attached nerve fibers or sound perception. And that depolarization of the hair cells is a crucial step in the process of converting those mechanics vibrations caused by the sound waves into neural signals for the brain to interpret as sound. So the outcome of the hair cells bending against the pectoral membrane is the depolarization of the attached nerve fibers. So answer choice B the attached nerve fibers depolarize is the correct answer. And all other answer choices are incorrect. I hope you found this video to be helpful. Thank you and goodbye.