The main function of neurons is to receive information, process this information, formulate an appropriate response, and then transmit this response to other cells. Information is transmitted to another cell across a synapse. The neuron sending the information is referred to as the pre-synaptic neuron. The cell receiving the information at the other end of the synapse is called the post-synaptic cell. The post-synaptic cell can be another neuron, a muscle cell, an endocrine cell, or other cell type. Much of information processing in the brain takes place at the level of the synapse. Test your basic knowledge of synaptic neurotransmission by taking this simple quiz.
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(1) At chemical synapses, opening of ion channels permeable to the following ions can lead to inhibitory postsynaptic potentials (IPSPs).
(2) At chemical synapses, opening of ion channels permeable to the following ions can lead to excitatory postsynaptic potentials (EPSPs).
(3) In the pre-synaptic axon terminal of a somatic motor neuron, synaptic vesicles are concentrated in highly specialized regions referred to as the:
(4) Calcium-dependent neurotransmitter release by neurons is quantal. One quantum represents the fusion of one synaptic vesicle with the presynaptic plasma membrane followed by the release of vesicle neurotransmitter content into the synaptic cleft.
(5) Asymmetric synapses are generally excitatory.
(6) Symmetric synapses are generally inhibitory.
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Posted: Friday, November 20, 2015
Last updated: Tuesday, March 11, 2025
Last updated: Tuesday, March 11, 2025
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