THE NERVOUS SYSTEM AND SENSES

1.The part of the eye that focuses light is the:
b.lens.

2. The part of the eye that controls how much light enters the eye is the:
a.iris.

3. The part of the eye that converts light into electrical energy is the:
c.retina.

4. Both eyes are needed to judge the distance of an oncoming car:
true.

5.The semi-circular canals are the part of the ear used to detect the direction of sound.
false.

6. A reflex action means that your hand is being drawn away from a hot plate before the brain is aware that you are in pain.
true.

7. The part of the ear that converts vibrations in to electrical signals is the:
a.ear drum.