The upstroke portion of the action potential in the Hodgkin-Huxley model is caused by 26. (Part 10, medium) 105-W2
A. the activation of sodium channels.
B. the activation of potassium channels.
C. the inactivation of the sodium channels.
D. the activation of leak conductance.
查看答案
The characteristic length λ in the linear cable equation is determined by all but which of the following parameters? *28. (Part 11, easy) 105-W3
A. Radius of the cable.
B. The resting membrane potential.
C. The membrane resistance.
D. The longitudinal resistance along the cable.
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.
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.
微信支付 
支付宝支付