Biological termModerate0.6 marks
4(a)(ii)
Based on the diagram drawn above in (i) give a suitable term for each of the following descriptions:
The sensory cells that help in hearing.
Topic: Organ of Corti
Previous-year question practice database
Answer
Exam answer
The ORGAN OF CORTI.
Explanation
The organ of Corti lies on the basilar membrane inside the COCHLEA and carries the sensory HAIR CELLS which convert sound vibrations into nerve impulses. It is the actual receptor for hearing.
THE DAMAGE IT SUFFERS IS PERMANENT: hair cells do NOT regenerate, so hearing loss from prolonged loud noise is irreversible — which is exactly what the 2026 paper examines through its quarry worker.
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