040 The Role of Hair Cells in Hearing

In this episode, Leslie Samuel explores the role of hair cells in hearing. The video begins with a recap of the cochlea's function and the basilar membrane's response to sound. It then delves into the specific role of inner hair cells, explaining how they transmit signals to the brain. The mechanics of hair cells, including the function of stereocilia and potassium channels, are discussed. The video also covers how potassium and calcium ions influence membrane potential, leading to neurotransmitter release. The episode concludes with a summary of how these processes connect to the auditory nerve and hearing.

Explain how the bending of hair cells leads to the perception of sound.

What role do hair cells play in the process of hearing?

Describe the mechanism by which potassium ions affect the hair cells.

What happens to calcium ions when the membrane potential of hair cells increases?

How are neurotransmitters released from hair cells, and what is their significance?