6. Given below is a diagram of a part of the human ear. Study the same and answer the questions that follow:

(i) Give the collective biological term for Malleus, Incus and Stapes.

(ii) Name the parts labeled A, B and C in the diagram.

(iii) State the functions of the parts labeled ‘A’ and ‘B’.

(iv) Name the audio receptor region present in the part labeled ‘A’.

Solution:-

(i) Ear ossicles are the collective biological term for Malleus, Incus and Stapes.

(ii)

The letter ‘A’ stands for Cochlea.

The letter ‘B’ stands for Semicircular canals.

The letter ‘C’ stands for Ear ossicles.

(iii) The Cochlea’s (A) job is to activate the hair-like processes of the sensory cells in the cochlea, and the impulse is then passed to the brain via the auditory nerve..
The function of Semicircular canals is canal is widened to form an ampulla which contains sensory cells for dynamic balance.

(iv) The organ of Corti is the audio receptor region present in the part labeled ‘A’.