problem 1:

The diagram below exhibits the internal structure of the human ear.

a) Name the structures labeled A, B, C.

b) Give the functions of parts D and E.

c) Which letters signify the parts of the ear in which nerve impulses are produced?

problem 2:

In what part of the eye are nerve impulses produced?

problem 3:

Propose one way by which the ear might be protected.

problem 4:

Describe how a corrective measure for the named defect of hearing or vision works.