Life Science

Chapter 21: Control and Coordination

Standardized Test Practice

1.
Which part of the brain controls heartbeat and breathing?

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A)cerebellum
B)brain stem
C)cerebrum
D)spinal cord
2.
Voluntary muscle movements are coordinated by the

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A)brain stem.
B)cerebrum.
C)cerebellum.
D)spinal cord
3.
Information from the senses is interpreted by the

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A)brain stem.
B)cerebellum.
C)spinal cord
D)cerebrum.
4.
The basic functioning units of the nervous system are cells called
A)neurons.
B)axons.
C)dendrites.
D)synapses.
5.
In some states, the legal blood alcohol percentage limit for driving under the influence of alcohol is 0.06 percent. How many drinks would it take a 72-kg man to exceed this limit?

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A)four
B)one
C)two
D)three
6.
Which structure of the eye does light pass through first?
A)cornea
B)lens
C)pupil
D)retina
7.
Which of these is a structure of the inner ear?
A)cochlea
B)anvil
C)eardrum
D)ear lobe
8.
What is the main function of the semicircular canals?
A)hearing
B)smell
C)vision
D)balance
9.
The structure labeled A in the diagram is a(n)

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A)axon.
B)dendrite.
C)synapse.
D)cell body.
10.
The structure labeled D in the diagram is either a cell body or a

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A)dendrite.
B)axon.
C)receptor.
D)neurotransmitter.
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