本题目来源于试卷: Interaction & Interdependence C.5 Neural Signaling，类别为 IB生物学
[单选题]
Which triggers the release of neurotransmitteus,jt*y. 6 d/itv1urjrs from jut4c:dsy, 6/y zwt:l ioa.05j/h u bhthe presynaptic membrane?
A. Depolarisation of the presynaptic membrane
B. A refractory period after depolarisation of the presynaptic membrane
C. Repolarisation of the presynaptic membrane
D. Activation of receptors on the postsynaptic neuron
参考答案: A
本题详细解析:
Explanation: Depolarisation triggers the influx of calcium ions into the presynaptic knob, which brings about the release of neurotransmitters from the presynaptic membrane, Choice A is correct. Choices B and C are incorrect, as neither depolarisation nor repolarisation can occur during the refractory period. Choice D is incorrect as activation of receptors on the postsynaptic membrane is caused by neurotransmitter binding; it does not trigger their release.
| 
