# Opioids act through two pathways to influence the activity of nerve cells. In one pathway, voltage-gated...

###### Question:

Opioids act through two pathways to influence the activity of nerve cells. In one pathway, voltage-gated Ca2+ channels in the nerve terminals are prevented from opening. Based on your understanding of the role of voltage-gated Cat in the pre- synaptic nerve cell, the effect of this would be to Answers A-D A prevent the influx of Ca2*, resulting in sustained release of neurotransmitter from the pre-synaptic cell. B to increase the duration of the action potential. o C prevent the influx of Ca2*, inhibiting secretion of neurotransmitters by fusion of secretory vesicles with the cell membrane. D prevent the influx of Ca2+, preventing the nerve cell from repolarizing. o

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