Answer:
What causes the second voltage-gated Na+ to open is the charge changes caused by the flow of ions through the first channel.
Explanation:
The second channel is a voltage-gated Na+ channel, we know that voltage-gated channels open their gates when there is a change in the voltage of the cell, by opening the first ion channel, there is a rush of ions to the inside of the cell that modifies the cell's voltage due to the new charges. The second channel is affected by this, and as a consequence, it opens its gates.
Probably just a cold it’s happened to me to unless your coughing blood or something
Answer:
to obtain oxygen from the external environmen
