Multiple Choice
Identify the choice that best completes the
statement or answers the question.
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1.
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When the nervous system makes you feel thirsty, what body process is it helping
to carry out?
a. | delivering oxygen to cells | b. | maintaining homeostasis | c. | moving the
body | d. | supporting the body |
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2.
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A change or signal in the environment that can make an organism react is called
a(n)
a. | stimulus. | b. | reaction. | c. | impulse. | d. | response. |
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3.
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What part of a neuron carries nerve impulses away from the cell body?
a. | axon | b. | synapse | c. | dendrite | d. | nucleus |
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4.
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A spinal nerve is made of
a. | sensory neurons only. | b. | interneurons only. | c. | both sensory neurons
and motor neurons. | d. | both interneurons and motor
neurons. |
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5.
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In some reflex actions, skeletal muscles contract without the involvement
of
a. | motor neurons. | b. | interneurons. | c. | the spinal
cord. | d. | the brain. |
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6.
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The sense organs send information about the environment to the
a. | brain. | b. | autonomic nervous system. | c. | somatic nervous
system. | d. | semicircular canals. |
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7.
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Nearsightedness and farsightedness are caused by
a. | a defect in the the shape of the eyeball. | b. | a defect in the
structure of the retina. | c. | the inability of the iris to change
size. | d. | damage to receptor cells in the retina. |
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8.
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What produces sound?
a. | light waves | b. | vibrating material | c. | chemicals in the
air | d. | rods and cones |
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9.
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The senses of smell and taste both depend on
a. | chemicals. | b. | waves. | c. | the semicircular
canals. | d. | the optic nerve. |
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10.
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Drugs that slow down the activity of the central nervous system are
called
a. | anabolic steroids. | b. | hallucinogens. | c. | stimulants. | d. | depressants. |
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11.
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When drug addicts stop using a drug, they may experience withdrawal
because
a. | the drug has damaged their kidneys. | b. | they have been infected by
HIV. | c. | their bodies have become physically dependent on the drug. | d. | the drug has made
them nervous. |
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12.
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What kind of drug is alcohol?
a. | anabolic steroid | b. | depressant | c. | stimulant | d. | inhalant |
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13.
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A synapse is the space between
a. | the cell body and the next structure. | b. | an axon and the cell body. | c. | a dendrite and the
cell body. | d. | an axon and the next structure. |
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14.
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Because of the way in which the lens of the eye bends light rays, the image
produced by the lens is
a. | black and white. | b. | usually blurred. | c. | right side
up. | d. | upside down. |
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15.
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Cone cells enable you to see
a. | colors. | b. | black and white. | c. | at
night. | d. | nearby objects. |
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Short Answer
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Use the diagram to answer each question.
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16.
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Explain how parts A and B work together to enable a skater to glide smoothly
across the ice.
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17.
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What part of the brain is indicated by D? What is its function?
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18.
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What part of the central nervous system is indicated by C? What is its
function?
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Use the diagram to answer each question. 
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19.
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Identify structures D and F. How are these structures related to each
other?
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20.
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Identify structure B. Explain what would happen if this structure were
damaged.
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21.
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When images focus in front of structure C, what condition results? How does this
condition affect people’s vision?
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Essay
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22.
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Describe the process by which a person hears a sound. Begin with sound waves
entering the ear and end with nerve impulses reaching the brain.
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23.
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Name the five main sense organs and the stimulus to which each responds.
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