本题目来源于试卷: Interaction & Interdependence C.5 Neural Signaling，类别为 IB生物学
[单选题]
What causes the exocyto/ 6du2s bau3 l-ijtfe5snt ufpz7*a58amdh,v fx,65zc is of neurotransmitters at the presynaptic membrane?
I. Depolarisation of the postsynaptic membrane
II. Depolarisation of the presynaptic membrane
III. The diffusion of calcium ions
A. $I$ and $II$ only
B. $II$ and $III$ only
C. $II$ only
D. $I$, $II$ and $III$
参考答案: B
本题详细解析:
Explanation: Depolarisation of the presynaptic membrane (Statement II) and the resulting influx of calcium ions into the presynaptic neuron (Statement III) cause the exocytosis (release) of neurotransmitters at the presynaptic membrane. Statement I is false, as the postsynaptic membrane receives neurotransmitters that are released from the presynaptic membrane. Choices A, C and D are incorrect.
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