Question

Which of the following events would increase in the probability of an action potential being generated by a neuron? Assume that the spike threshold is -55 mV and ECl is -63 mV.

Opening of Na+ channels

Opening of K+ channels

Opening of Cl- channels

Opening of nonspecific cation channels that are equally permeable to Na+ and K+ channels

Answer 1

The opening of Na+ channels increases the probability of an action potential being generated by a neuron.

Step-by-step explanation:

An action potential is generated when the neuron reaches its threshold potential of -55 mV. The opening of Na+ channels and the subsequent influx of positive ions into the cell will depolarize the membrane, increasing the probability of an action potential. Therefore, the opening of Na+ channels would increase the probability of an action potential being generated by a neuron.