How can only positive ions result in depolarization and repolarization of the membrane during an action potential?

What happens if a potassium channel opened before sodium channels during the action potential process?

What is the importance of the sodium-potassium pump in neuron function? What do you think would be the effect on action potentials if the sodium-potassium pump stopped functioning due to the lack of ATP?

What causes depolarization of a neuron membrane potential?

Describe the role of sodium ions and sodium channels in generating an action potential

If: membrane potential=-70mV, ENa=+60mV, and Ex=-90mV, consider which directions Na+ and K+ will leak across the membrane. If both ions are crossing the membrane, what is the most important factor in determining whether membrane potential will become more positive or more negative?

Describe what allows an action potential to move quickly along the membrane in one direction (why doesn't it move backwards?)

Consider the following three diagrams of a nerve cell membrane. They show resting potential, depolarization, and hyperpolarization. Figure out which one is which, then draw them in the order they occur in a cell that undergoes an action potential outside + Na* inside K* Na* Nat K Nat K Na potential: -80 mV outside + Na K* Na* inside Na+ K Nat Na* K+ potential: +30 mV outside Na Na Na Na* K+ inside K* Na* Kt potential: -70 mV

Compare and contrast viral proteins with anti-immune system properties and their targets of SARS-COV-2 and Influenza Type A Virus.

How does the movement of ICF K+ ions down its concentration gradient affect membrane potential?