The INa,p model exhibits bistability and hysteresis in response to the external current input. Which of the following statements correctly describes the phenomenon? 47. (Part 15, difficult) 105-Mid
A. This is due to the activation of potassium channels.
B. The membrane potential depends on not only the momentarily current input, but also on its history.
C. The phenomenon has never been observed experimentally.
D. None of above.
查看答案
A membrane current can be classified into inward and outward directions, and the associated gating mechanism can be classified into activation and inactivation. Accordingly, four current types can be defined. Which of the following statements about the four current types is not correct? 44. (Part 15, difficult)105-Mid
A. The persistent sodium channel corresponds to the inward-activation type.
B. The outward-activation current is a stable current.
C. The inactivation gate of the sodium channel produces an inward-inactivation current.
D. The inward inactivation current is an unstable current
Which of the following is not a correct comparison between the Euler’s method and the second order Runge-Kutta method for solving the differential equations? 41. (Part 14, difficult) 105-W4 105-Mid
A. The Euler’s method is less accurate.
B. The Runge-Kutta method requires less computational power.
C. The Euler’s method is faster.
D. With the same step size, the Rugen-Kutta method produces less error.
What is the purpose of a solver in a neural network simulator? 40. (Part 14, easy) 105-W4 105-Mid
A. Solving the conflict between the parameters entered by the users.
B. Solving the differential equations used to describe the models.
C. To display the result of the model simulations.
D. To provide an interface between the users and the simulator.
How does the thickness of myelin affect the propagation of an action potential? 37. (Part 13, medium) 105-Mid
A thicker myelin leads to a faster propagation speed.
B. A thicker myelin reduces the propagation speed of the action potential.
C. A thicker myelin increases the membrane leak current.
D. The thickness of myelin does not influence the propagation of the action potential.
微信支付 
支付宝支付