Name: 
 

Chapter 20 Quiz



Multiple Choice
Identify the choice that best completes the statement or answers the question.
 

 1. 

The brain includes all of the following parts EXCEPT the:
a.
cerebrum.
b.
medulla.
c.
photoreceptors.
d.
cerebellum.
 

 2. 

The central nervous system includes:
a.
the brain and spinal cord.
b.
sensory nerves and motor nerves.
c.
withdrawal nerves and impulse nerves.
d.
all the nerves throughout the body.
 
 
nar001-1.jpg
Figure 20-1A
 

 3. 

In Figure 20-1A, the dendrites are labeled:
a.
A
b.
B
c.
C
d.
D
 

 4. 

In Figure 20-1A, the nucleus of the cell is labeled:
a.
A
b.
B
c.
C
d.
D
 

 5. 

In Figure 20-1A, the cell body is labeled:
a.
A
b.
B
c.
C
d.
D
 

 6. 

In Figure 20-1A, the axon is labeled:
a.
A
b.
B
c.
C
d.
D
 

 7. 

If the right half of your cerebrum was damaged, which part of your body would be affected?
a.
Top half
b.
Bottom half
c.
Right half
d.
Left half
 

 8. 

Which of the following would be considered a “withdrawal reflex”?
a.
Running away from a scary dog
b.
Reading the newspaper
c.
Walking down a flight of stairs
d.
Quickly moving your hand away from a hot object
 

 9. 

The photoreceptors in the eye that respond to color are:
a.
rod cells.
b.
cone cells.
c.
red cells.
d.
color cells.
 

 10. 

The optic nerve in your eye:
a.
responds to color.
b.
sends nerve impulses to the brain.
c.
opens or closes to change the pupil.
d.
responds to light intensity.
 

 11. 

Rod cells respond to:
a.
white, black, and gray.
b.
red, white, and blue.
c.
red, green, and blue.
d.
red, yellow, and blue.
 

 12. 

When cone cells are stimulated by equal amounts of red, green, and blue light, we see:
a.
no light.
b.
white light.
c.
red light because it is the dominant color.
d.
orange light.
 

 13. 

If there is no light in a completely dark room, could you see your hand in front of your face?
a.
Yes
b.
No
c.
Only in black in white
d.
Very dimly
 

 14. 

The place where rays of light cross after they have been bent by a convex lens is known as the:
a.
reflection point.
b.
focal point.
c.
optical center.
d.
lens.
 

 15. 

The human eye is able to focus on objects that are near and objects that are far away because:
a.
the lens changes shape.
b.
the cone cells are sensitive to color.
c.
the eyeball changes shape.
d.
the iris changes the amount of light let into the eye.
 

 16. 

What happens to your pupil when a light is turned on in your room in the middle of the night?
a.
It gets smaller.
b.
It gets larger.
c.
It changes its focal length.
d.
It makes objects look upside down.
 



 
Check Your Work     Start Over