Action potential steps quizlet
Action potential propagation along an axonAction potentials result from the presence in a cell's membrane of special types of voltage-gated ion channels. A voltage-gated ion channel is a cluster of proteins embedded in the membrane that has three key properties: It is capable of assuming more than one conformation.
The action potential arrives, causing sodium to enter and depolarize the axon terminal Neural Synapse - Step 2 The depolarization causes voltage-gated calcium channels to open, resulting in a large influx of Ca2+ ions entering the synaptic knob
Action Potential. A stimulus from a sensory cell or another neuron causes the target cell to depolarize toward the threshold potential. If the threshold of excitation is reached, all Na + channels open and the membrane depolarizes. At the peak action potential, K + channels open and K + begins to leave the cell.