EXERCISES, LESSON 13
REQUIREMENT. The following exercises are to be answered by completing the
incomplete statements.
After you have completed all the exercises, turn to "Solutions to Exercises" at the end of
the lesson, and check your answers.
1.
Please complete the table below.
SPECIAL SENSE
RECEPTOR ORGAN
STIMULUS
Sight
Hearing
Balance
Smell
Taste
2.
When you look at an object, light from the right half of the visual field goes to the
t half of
t half of each eye. Light from the left half of the visual field goes to the
each eye.
The light ray stimulus chemically changes the visual chemical found in the
es
and
ds. The cones of the retina are for
te vision and also receive
r
information. Light received by the rods is perceived in terms of
and
e. The
stimulus from the cones and rods is transferred to the b
r cells and then to the
n cells. The axons of the ganglion cells leave the eyeball to become the
c
nerve. Since the circular area where these axons exit contains neither cones nor rods,
this area is called the
spot.
3.
The axons from the nasal (medial) halves of the retinas cross to the opposite
sides at the optic
sma. Thus, if an object is in your right visual field, the
information is carried by your
t optic tract. If an object is in your left visual field,
the information is carried by your
t optic tract. For conscious perception of vision,
the information enters the
al lobes of the cerebral cortex. Note that the right
visual field is perceived within the
t cerebral hemisphere, and the left visual field is
perceived within the
t cerebral hemisphere.
MD0007
13-18