The figure illustrates the Action Potential. What does C represent?
A. repolarization
B. depolarization
C. local potential
D. threshold
E. afterpotential
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Question 2) Identify structure E on the neuron.
A. Schwann cell
B. Node of Ranvier
C. neuron cell body (soma)
D. dendrites
E. axon
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Question 3) Neurons arranged in a circular pathway form
A. neuromotor junctions.
B. temporal circuits.
C. reverberating circuits.
D. spatial pathways.
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Question 4) Identify structure C on the neuron.
A. Schwann cell
B. Node of Ranvier
C. neuron cell body (soma)
D. dendrites
E. axon
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Question 5) Identify structure B on the neuron.
A. Schwann cell
B. Node of Ranvier
C. neuron cell body (soma)
D. dendrites
E. axon
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Question 6) Identify structure A on the neuron.
A. Schwann cell
B. Node of Ranvier
C. neuron cell body (soma)
D. dendrites
E. axon
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Question 7) Identify structure D on the neuron.
A. Schwann cell
B. Node of Ranvier
C. neuron cell body (soma)
D. dendrites
E. axon
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Question 8) If five action potentials arrive at the same synapse in very close succession, which of the following would occur?
A. The direction of the action potential is reversed.
B. Temporal summation occurs.
C. Spatial summation occurs.
D. Hyperpolarization occurs.
E. Depolarization always occurs.
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Question 9) Suppose both excitatory and inhibitory neurons synapse with a single postsynaptic neuron. What determines if an action potential is initiated in the postsynaptic neuron?
A. the kind of neuron involved
B. the size of the neuron involved
C. whether the neuron is myelinated or non-myelinated
D. the number of EPSPs in relation to the number of IPSPs
E. This situation is not possible in humans.
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Question 10) Sensory neurons carrying action potentials from pain receptors synapse within the spinal cord with interneurons.
These interneurons synapse with motor neurons leading back to an effector and ascending neurons that carry action potentials toward the brain. This is an example of a(n) _____ pathway.
A. convergent
B. divergent
C. reverberating
D. sensory
E. bifurcated
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