Question

The sensory receptors that respond to sound, develop receptor potentials when their

• A. Hairs are absent
• B. Pigments absorb pressure
• C. Surface proteins are altered by a change in pH
• D. Sodium-potassium pumps become deactivated.

Answer 1

Answer: (A)

Hairs are absent

The organ of Corti is a structure located on the basilar membrane which contains hair cells that act as auditory receptors. Movements of the basilar membrane bend the hair cells, pressing them against the technical membrane. As a result, nerve impulses are generated in the association afferent neurons. These impulses are transmitted by the afferent fibers via auditory nerves to the auditory cortex of the brain, where the impulses are analyses and the sound is recognized.

So the correct answer is 'Hairs are absent'.