For each of the following phases of the action potential [A) Resting State; B) R

Question

For each of the following phases of the action potential [A) Resting State; B) Rising Phase; C) The Peak; D) The Undershoot], can you please answer these questions? I am very confused about the answers to these questions specifically for C) The Peak, and D) The Undershoot, so could you please provide explanations for that? Thank you!

---Is the Voltage-gated Na activation gate closed?

---Is the Voltage-gated Na Inactivation gate open or closed?

---Is the Voltage-gated K gate opened or closed?

---Is the movement of K flowing inward, outward, or no movement?

---Is the movement of Na flowing inward, outward, or no movement?

Explanation / Answer

See first of all

1.resting phase

During this phase,Na and Ca channels closed, k channels open

2.rising phase

Rapid Na influx through open fast Na channels

3.peak

k channels open, k efflux through k channels.and Na channels closed.

4.undershoot phase

Ca influx through slow Ca channels, k efflux through k channels.

So during rising phase voltage gated Na channels opens quickly.and voltage gated K channels begins to open slowly.

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