阿摩線上測驗
57. A postsynaptic neuron receives input from three neurons (X, Y, and Z). Simultaneous activation of X and Y results in an action potential. However, when X and Z are activated together, the membrane potential fails to reach the threshold and remains near the resting level. Given that X alone produces a subthreshold EPSP, what is the most likely nature of Y and Z?
(A) Y is inhibitory; Z is excitatory.
(B) Y is excitatory; Z is inhibitory.
(C) Both Y and Z are excitatory.
(D) Both Y and Z are inhibitory.
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統計： A(1), B(7), C(1), D(0), E(0) #3839992
統計： A(1), B(7), C(1), D(0), E(0) #3839992
