Which of the following processes does not involved in the signal propagation at a chemical synapse? 16. (Part 06, medium) 105-Mid
A. synaptic vesicles release neurotransmitters in the presynaptic terminal.
B. neurotransmitters diffuse across the synaptic clef.
C. Postsynaptic receptors are activated by the neurotransmitters.
D. Vesicles transport neurotransmitters from the synaptic terminals to the soma in the postsynaptic side.
查看答案
What happens to a leaky integrate-and-fire neurons when the refractory period is introduced to the model? 14. (Part 05, difficult) 105-Mid
A. The firing rate is increased under the same current input.
B. The neuron starts to fire spontaneously.
C. The firing rate of the neuron is limited by a maximum level.
D. The maximum firing rate of the neuron is increased.
With a large and constant current injection, the leaky integrate-and-fire model responds to it with which of the following firing patterns? 12. (Part 05, easy) 105-Mid
A. an increasing firing rate throughout the entire input period
B. a constant firing rate.
C. a random spiking pattern
D. a decreasing firing rate.
How does the membrane potential relax to the resting potential? 10. (Part 04, easy) 105-Mid
A. Linearly
B. With a parabolic curve
C. Exponentially
D. With a hyperbolic curve.
What happens to the resting potential in the leaky integrate-and-fire model when the conductance of a specific type of ion channels becomes extremely large? 9. (Part 04, difficult) 105-Mid
A. the resting potential does not change.
B. the resting potential approaches the reversal potential of the given type of ion channels.
C. the resting potential moves far away from the reversal potential of the given type of ion channels.
D. the resting potential becomes zero.
微信支付 
支付宝支付