The likelihood of an action potential will increase whenever:
A)sodium channels open, allowing sodium ions to flow into a neuron
B)either potassium ions flow out of the cell body or chloride ions flow into the cell body
C)either chloride ions flow out of the cell body or potassium ions flow into the cell body
D)the neuron's sodium/potassium pump is inactivated

Question

Quizplus · Accepted Answer

The opening of sodium channels allows positive sodium ions to enter the neuron, which depolarizes the cell and increases the likelihood of an action potential. Option B and C describe hyperpolarization, which would decrease the likelihood of an action potential. Option D refers to the inactivation of the Na+/K+ pump which would not directly impact the likelihood of an action potential.

The Likelihood of an Action Potential Will Increase Whenever