What is the primary function of the inner hair cells in the ear?

The primary function of the inner hair cells in the ear is to transmit sound signals to the brain. Inner hair cells are sensory receptors located in the cochlea of the inner ear and play a crucial role in the auditory system. When sound waves enter the cochlea, they create fluid movements that stimulate the basilar membrane. This motion causes the inner hair cells to bend, ultimately leading to the release of neurotransmitters. These neurotransmitters are then sent to the auditory nerve, where they convert the mechanical sound signals into electrical signals that the brain can interpret as sound.

This function is central to our ability to hear and process various sounds. The inner hair cells are essential for converting mechanical energy from sound vibrations into neural signals, which is a vital step in the auditory pathway. Other choices, while relevant to the structure and function of the ear, do not accurately represent the primary role of inner hair cells in hearing.