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Section I: Chapters 1 through 3
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In the following questions, select the single best answer.
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1. The basic neuronal signaling unit is–
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A. the equilibrium potential
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D. the supernormal period
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2. In a motor neuron at rest, an excitatory synapse produces an EPSP of 15 mV, and an inhibitory synapse produces an IPSP of 5 mV. If both the EPSP and IPSP occur simultaneously, then the motor neuron would–
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A. depolarize by about 10 mV
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C. depolarize by more than 20 mV
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D. change its potential by less than 1 mV
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3. The equilibrium potential for K+ in neurons is ordinarily nearest–
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A. the equilibrium potential for Na+
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C. reversal potential for the EPSP
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D. the peak of the action potential
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4. Generation of the action potential–
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A. depends on depolarization caused by the opening of K+ channels
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B. depends on hyperpolarization caused by the opening of K+ channels
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C. depends on depolarization caused by the opening of Na+ channels
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D. depends on hyperpolarization caused by the opening of Na+ channels
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E. depends on second messengers
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5. The cerebrum consists of the–
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A. thalamus and basal ganglia
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B. telencephalon and midbrain
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C. telencephalon and diencephalon
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D. brain stem and prosencephalon
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E. cerebellum and prosencephalon
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6. The somatic nervous system innervates the–
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A. blood vessels of the skin
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B. blood vessels of the brain
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D. muscles of the body wall
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+...