Once the threshold for an action potential is reached what is the sequence of events that occur?
1. Potassium channels are activated and potassium ions move out of the neuron.
2. Sodium channels are activated and sodium ions move into the neuron.
3. The interior of the neuron becomes more negatively charged than the exterior.
4. The interior of the neuron becomes more positively charged than the exterior.
a. 1, 3, 4, 2
b. 2, 4, 1, 3
c. 4, 1, 2, 3
d. 3, 2, 1, 4
Question 2
Which is an accurate statement regarding the generation of an action potential?
a. If a neuron becomes hyperpolarized to the threshold level, an action potential is inevitable.
b. Small hyperpolarizations lead to small action potentials and large hyperpolarizations lead to large action potentials.
c. If a neuron becomes depolarized to the threshold level, an action potential is inevitable.
d. Small depolarizations lead to small action potentials and large depolarizations lead to large action potentials.
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Neuronal action potential.
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