Which of the following is the correct sequence of events that occur during synaptic transmission?

Question

BlackTom AI · Accepted Answer

To address the question, we first recall the canonical sequence of events in synaptic transmission during an action potential.
Option a starts with the postsynaptic cell responding before the presynaptic events occur, which cannot be correct because the postsynaptic response depends on neurotransmitter release following an action potential.
Option b suggests that the action potential arrives at the axon terminal, then neurotransmitter binds to receptors before release. In reality, neurotransmitter binding to receptors on the postsynaptic side cannot occur until the neurotransmitter is released into the synaptic cleft from the presynaptic terminal.
Option c presents the sequence: Action potential arrives at axon terminal, neurotransmitter is released into the synaptic cleft, neurotransmitter binds to receptor, and the postsynaptic cell responds. This aligns with the standard model: depolarization of the presynaptic bouton triggers voltage-gated calcium channels to open, triggering vesicle fusion and neurotransmitter release; the neurotransmitter then binds to receptors on the postsynaptic membrane, initiating a response.
Option d reverses the order by implying release occurs before the action potential arrives at the terminal, which is physiologically implausible since action potentials drive release.
Option e places the postsynaptic response before neurotransmitter release and receptor binding, which cannot initiate a postsynaptic response without the signaling molecule being present in the cleft.
In sum, only option c maintains causal order: presynaptic electrical event leads to chemical transmission, which then elicits a postsynaptic response, matching the known sequence of synaptic transmission.

My LMS Subjects Practice test (nervous system)

Which of the following is the correct sequence of events that occur during synaptic transmission?

查看解析

登录即可查看完整答案

类似问题

Which of the following explains why one-way synaptic transmission occurs?

Question at position 3 Select all the ways a neurotransmitter can exit the space between neurons.DiffusionReuptake/recyclingAxon travelEnzymes will digest the neurotransmitter.Immune cells will attack.

At a synapse between two neurons, the dendrites release the neurotransmitters.

Consider a neuron-neuron synapse. Match the description with the presynaptic or postsynaptic neuron. 1: Action potential travels away from the synapse via this neuron. 2: First in the chain of neurons. 3: Second in the chain of neurons. 4: Releases neurotransmitter.

The theory of quantal mechanism of neurotransmission was based on electrophysiology providing evidence for quantal activity in synaptic transmission combined with electron microscopy revealing vesicles near terminal boutons.

What accounts for the longest delay in neuronal signalling?

What accounts for the longest delay in neuronal signalling?

更多留学生实用工具

考试浏览器助手

风格化写作助手

论文查重助手

文献引用助手

课堂转译助手

课堂笔记助手

Quiz搜索助手

学校历年真题

智能刷题助手

智能匹配练习

希望你的学习变得更简单

My LMS Subjects Practice test (nervous system)

Which of the following is the correct sequence of events that occur during synaptic transmission?

查看解析

登录即可查看完整答案

类似问题

Which of the following explains why one-way synaptic transmission occurs?

Question at position 3 Select all the ways a neurotransmitter can exit the space between neurons.DiffusionReuptake/recyclingAxon travelEnzymes will digest the neurotransmitter.Immune cells will attack.

At a synapse between two neurons, the dendrites release the neurotransmitters.

Consider a neuron-neuron synapse. Match the description with the presynaptic or postsynaptic neuron. 1: Action potential travels away from the synapse via this neuron. ____ 2: First in the chain of neurons. ____ 3: Second in the chain of neurons. ____ 4: Releases neurotransmitter. ____

The theory of quantal mechanism of neurotransmission was based on electrophysiology providing evidence for quantal activity in synaptic transmission combined with electron microscopy revealing vesicles near terminal boutons.

What accounts for the longest delay in neuronal signalling?

What accounts for the longest delay in neuronal signalling?

更多留学生实用工具

希望你的学习变得更简单

Consider a neuron-neuron synapse. Match the description with the presynaptic or postsynaptic neuron. 1: Action potential travels away from the synapse via this neuron. 2: First in the chain of neurons. 3: Second in the chain of neurons. 4: Releases neurotransmitter.