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An action potential does not propagate back to the soma from an axon due to 34. (Part 13, easy) 105-W3

A. inactivation of K+ channels in soma.
B. inactivation of Na+ channels in the upstream region.
C. influx of Ca2+.
D. leakage of membrane currents.

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What is the role of nodes of Ranvier in the propagation of action potential? 36. (Part 13, easy) 105-W3

A. Suppressing the action potential.
B. Providing insulation to the axon.
C. Regenerating action potential.
D. Providing synaptic inputs to the neuron.

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Given the simple firing rate model, τdv/dt=-v+w · u, in which v is the rate of the postsynaptic neuron, u and w are vectors representing the rates of the presynaptic neurons and the corresponding synaptic weights, respectively, which of the following equations describes the steady-state activity of the model? *76. (part 24, easy) 105-W8

A. w=vu
B. v=u
C. v=w · u
D. u=vw

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In the firing rate model, τdv/dt=-v+w · u, discussed in the part 24, which of the following statements is not the problem of the basic Hebb rule? *78. (part 24, medium) 105-W8

A. The learning rate is too slow.
B. The basic Hebb rule is unstable
C. The synaptic weights grow indefinitely.
D. The basic Hebb rule fails to suppress synapses.

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What is an unsupervised learning? 81. (part 25, medium) 105-W8

A learning rule which consider the timing of each input spike.
B. A learning rule which has no biological application.
C. A learning mechanism in which the correct response to a stimulus is not given to the network.
D. A learning mechanism in which the correct response to a stimulus is given to the network.

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An action potential does not propagate back to the soma from an axon due to 34. (Part 13, easy) 105-W3

A. inactivation of K+ channels in soma. B. inactivation of Na+ channels in the upstream region. C. influx of Ca2+. D. leakage of membrane currents.

What is the role of nodes of Ranvier in the propagation of action potential? 36. (Part 13, easy) 105-W3

In the firing rate model, τdv/dt=-v+w · u, discussed in the part 24, which of the following statements is not the problem of the basic Hebb rule? *78. (part 24, medium) 105-W8

What is an unsupervised learning? 81. (part 25, medium) 105-W8

A. inactivation of K+ channels in soma.
B. inactivation of Na+ channels in the upstream region.
C. influx of Ca2+.
D. leakage of membrane currents.