NABTEB Biology 2025 Objective — Question 18
Question 18 of 50 from the National Business and Technical Examinations Board (NABTEB) Biology 2025 Objective paper, with the correct answer and a full explanation.
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During the process of hearing in mammals, the structure in the middle ear which receives the first vibration is the
- A. oval window
- B. round window
- C. incus
- D. malleusCorrect
Explanation
Sound waves first hit the eardrum (tympanic membrane), causing it to vibrate; these vibrations are transmitted to the ossicles, small bones in the middle ear. The malleus (also known as the hammer) is the first bone to receive the vibrations from the eardrum.
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