When a constant current is injected into a dendrite, how does the membrane potential changes along the dendrite? 31. (Part 12, easy) 105-W3
A. The membrane potential remains constant.
B. The membrane potential decays linearly.
C. The membrane potential follows a Gaussian distribution.
D. The membrane potential decays exponentially.
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Which of the following statements about the compartmental model is not correct? 33. (Part 12, medium) 105-W3
A. It describes the variation of membrane potential across different parts of a neuron.
B. It does not consider the morphology of a neuron.
C. It describes the currents flow between neighboring compartments.
D. It describes the dynamics of a neuron more precisely.
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
A. Suppressing the action potential.
B. Providing insulation to the axon.
C. Regenerating action potential.
D. Providing synaptic inputs to the neuron.
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