What type of cells are located between the tectorial and basilar membranes?

The correct choice is outer hair cells. These specialized sensory cells are situated in the cochlea of the inner ear, specifically located between the tectorial membrane and the basilar membrane. Outer hair cells play a crucial role in the amplification and fine-tuning of sound vibrations. They not only help detect sound by converting mechanical movements into electrical signals but also enhance the performance of inner hair cells, which are responsible for sending the auditory information to the brain.

The position of outer hair cells in relation to the tectorial and basilar membranes is vital for their function. These cells can change shape in response to sound, which helps in the active process of hearing and contributes to the sensitivity and frequency selectivity of hearing. Understanding the role of outer hair cells is essential in the context of hearing disorders, as damage to these cells can lead to significant hearing loss.