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A volley of impulses travelling in a pre-synaptic neurone causes A. An identical volley in the post-synaptic neurone. B. An increase in the permeability of the pre-synaptic nerve terminals to calcium. C. Vesicles in the nerve endings to fuse with the cell membrane and release their contents. D. The generation of at least one action potential in the post-synaptic neurone. E. Neurotransmitter to travel down the nerve axon. |
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Answer» A. False The synapse may amplify or attenuate the signal. B. True The uptake of Ca2+ by the nerve ending facilitates release of transmitter. C. True The neurotransmitter contained in the vesicles is released by exocytosis. D. False The impulses may be inhibitory; even if they are excitatory, the post-synaptic neurone may be strongly inhibited by inputs from other pre-ganglionic neurones. E. True Neurotransmitter is thought to be synthesized and packaged in the Golgi apparatus in the neurone cell body before travelling down the axon to the nerve terminals. |
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