Multiple Choice Identify the
choice that best completes the statement or answers the question.
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1.
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The brain includes all of the following parts EXCEPT the:
a. | cerebrum. | b. | medulla. | c. | photoreceptors. | d. | cerebellum. |
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2.
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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. |
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Figure 20-1A
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3.
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In Figure 20-1A, the dendrites are labeled:
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4.
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In Figure 20-1A, the nucleus of the cell is labeled:
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5.
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In Figure 20-1A, the cell body is labeled:
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6.
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In Figure 20-1A, the axon is labeled:
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7.
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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 |
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8.
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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 |
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9.
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The photoreceptors in the eye that respond to color are:
a. | rod cells. | b. | cone cells. | c. | red
cells. | d. | color cells. |
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10.
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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. |
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11.
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Rod cells respond to:
a. | white, black, and gray. | b. | red, white, and blue. | c. | red, green, and
blue. | d. | red, yellow, and blue. |
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12.
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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. |
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13.
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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 |
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14.
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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. |
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15.
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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. |
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16.
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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. |
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