Question

Scala tympani of membranous labyrinth ends at A which opens into B. Identify A and B and select correct option.

• A. A – oval window, B – pharynx
• B. A – round window, B – middle ear
• C. A – round window, B – external auditory meatus
• D. A – oval window, B – middle ear

Hint:

Oval window receives vibrations; round window releases pressure in cochlea.

Answer 1

The Correct Option is B

Step 1: Understanding scala tympani.
Scala tympani is a part of the bony labyrinth of the cochlea and is filled with perilymph.
Step 2: Terminal point of scala tympani.
Scala tympani ends at the round window.
Step 3: Connection of round window.
The round window opens into the middle ear cavity and helps in dissipation of sound waves.
Step 4: Conclusion.
Hence, A is round window and B is middle ear.