Sense Organs The Eye

The diagram shows the structures of the eye.

Which of the combinations about the structures of the eye, their names and their functions is INCORRECT?

• Structure: i

  Name: Iris

  Function: Controls how much light enters the eye

• Structure: ii

  Name: Cornea

  Function: Protects the eye

• Structure: iii

  Name: Pupil

  Function: Allows light to enter the eye

• Structure: iv

  Name: Lens

  Function: Focuses light onto structure v

The diagram shows the structures of the eye.

Which of the following statements about structure v is/are correct?

(1) It contains light-sensitive cells.

(2) It maintains the shape of the eyeball.

(3) It helps focus light that enters the eye.

• (1) only

• (2) only

• (1) and (3) only

• (2) and (3) only

The diagram shows the structures of the eye.

Which structures does light pass through when it is entering the eye?

• Structures i, ii, iv and v only

• Structures i, iii, iv and vi only

• Structures ii, iii, iv and vii only

• Structures iii, iv, v and ix only

True or false:

A sense organ is responsible for detecting one kind of stimulus only.

• True

• False

True or false:

Both our nose and our tongue are responsible for detecting chemicals.

• True

• False

True or false:

Certain area on the blind spot of our eye does not contain any cells.

• True

• False