The graph represents the potential difference across the membrane of an axon during an action potential.
Which row in the table correctly describes the events occurring at the specified position on the graph?
| Position on graph | Voltage-gated Na+\text{Na}^+Na+ channels | Voltage-gated K+\text{K}^+K+ channels | Net movement of ions via diffusion | |
|---|---|---|---|---|
| A | XXX | Closed | Open | K+\text{K}^+K+ out of the axon |
| B | WWW | Closed | Closed | Na+\text{Na}^+Na+ out of the axon |
| C | YYY | Closed | Open | K+\text{K}^+K+ out of the axon |
| D | ZZZ | Open | Closed | Na+\text{Na}^+Na+ into the axon |
Row A
Row B
Row C
Row D
