Question

At resting potential, the equilibrium voltage is maintained in part by chloride ions and other anions inside the cell and by the action of the _____ - ______ pump. Because of the action of the pump, there is a higher concentration of _________ions inside the cell and a higher concentration of ___________ions outside the cell. A small depolarization of the cell results in rapid opening of voltage-gated _______ channels while the voltage-gated __________channels stay closed. ________ flows into the axon, causing further depolarization. The inactivation loop closes the voltage-gated __________ channels, and the voltage-gated _______ channels finally open. Now, ________ions flow out of the cell. At the end of the axon, calcium ions flow into the nerve cell to trigger fusion of vesicles containing neurotransmitters to enter the synapse.

Answer 1

At resting potential, the equilibrium voltage is maintained in part by chloride ions and other anions inside the cell and by the action of the ____Na+_ - __K+____ pump. Because of the action of the pump, there is a higher concentration of ____K+_____ions inside the cell and a higher concentration of ____Na+_______ions outside the cell. A small depolarization of the cell results in rapid opening of voltage-gated _Na+ - Ca++______ channels while the voltage-gated ____K+______channels stay closed. _Na+_______ flows into the axon, causing further depolarization. The inactivation loop closes the voltage-gated ___Na+_______ channels, and the voltage-gated __K+_____ channels finally open. Now, __K+______ions flow out of the cell. At the end of the axon, calcium ions flow into the nerve cell to trigger fusion of vesicles containing neurotransmitters to enter the synapse.