Which of the followings is the main function of myelin? 35. (Part 13, easy)105-Mid
Amplifying the action potential.
B. Increasing the sensitivity of receptors.
C. Increasing the firing rate of a neuron.
D. Increasing the propagation speed of an axon.
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After a current pulse is injected into the dendrite, what can be observed in the propagation of the peak membrane potential? 32. (Part 12, medium)105-Mid
A. The propagation speed is roughly a constant at the location far away from the injecting site.
B. The propagation speed decreases linearly with the distance from the injecting site.
C. The propagation speed accelerates.
D. The peak membrane potential does not propagate.
What does the linear cable equation describe? 29. (Part 11, medium) 105-Mid
A. Currents that pass through the synapses.
B. Action potentials that propagate along the axons.
Currents that propagate along the dendrites.
D. Activation of membrane channels.
What do you expect if the potassium channels in the Hodgkin-Huxley model are blocked? 27. (Part 10, difficult) 105-Mid
A. The action potential cannot be initiated
B. The action potential cannot be quickly reset.
C. The refractory period is eliminated.
D. No effect will be observed.
Which of the following components in the Hodgkin-Huxley model has the fastest dynamics? 25. (Part 09, medium)105-Mid
A. The inactivation gate of the potassium channels.
B. the activation gate of the potassium channels.
C. the Inactivation gate of the sodium channels.
D. The activation gate of the sodium channels.
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