BSCS Biology: A Molecular Approach

Chapter 21: Nervous Systems

Chapter Test

1.
What is one of the main parts of a neuron?
A)myelin sheath
B)glia
C)axon
D)synapse
2.
What is true about the structure of the eye, shown here?
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A)Light enters the eye through the lens, an adjustable opening in the iris.
B)The retina contains neurons that process visual information before it is sent to the brain.
C)Rods and cones are special receptor cells located in the cornea.
D)When light enters the eye, the lens sharply focuses the image on the optic nerve.
3.
The ____ system allows an organism to respond to stimuli. It is made up of ____, such as muscle and glands, which carry out the responses.
A)sensory, effectors
B)sensory, receptors
C)motor, receptors
D)motor, effectors
4.
What is true about the divisions of the vertebrate nervous system shown here?
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A)The peripheral nervous system consists of the brain and spinal cord.
B)The somatic nervous system controls sleep, appetite, and digestion.
C)The sympathetic and parasympathetic systems produce opposite effects.
D)The autonomic nervous system controls the skeletal muscles.
5.
The ____ is the part of the brain that is responsible for sight, touch, and hearing.
A)cerebellum
B)medulla
C)cerebrum
D)hypothalamus
6.
A wave of electric current that spreads along an axon is called ____.
A)a nerve impulse
B)a synapse
C)the resting potential
D)the depolarized region
7.
What will most likely happen to the neurotransmitters shown here after they transmit their signal to the postsynaptic neuron?
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A)They will be absorbed by the presynaptic cell.
B)They will be absorbed by the postsynaptic cell.
C)They will diffuse in the brain and be absorbed by other neurons.
D)They will remain bound to the synaptic cell.
8.
What is one effect of alcohol on the brain?
A)It creates an imbalance of neurotransmitters.
B)It mimics neurotransmitters.
C)It blocks the reabsorption of neurotransmitters from the synaptic space.
D)It inhibits transmission of nerve impulses at synapses.
9.
The most important determining factor of brain complexity in mammals is____.
A)surface area of the cerebrum
B)amount of glial cells in the cerebellum
C)the number of synaptic connections in the medulla
D)size of the thalamus
10.
How do the Purkinje cells of fish and mammals differ?
A)Purkinje cells in mammals have more dendrites.
B)Purkinje cells in fish have no dendrites or axons.
C)Purkinje cells in mammals are smaller.
D)Purkinje cells in fish have multiple cell bodies.
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