Hi,
Please see the complete matching of words and explanation in attached file.
Hope it helps!
Facilitated diffusion but I might be wrong
<span>They have very stable outer electron shells</span>
Mesophyll is a partí al reaction
If the Na+ voltage-gated channels in a muscle cell open, the Na (sodium) ions rush inside the muscle cell and makes the cell more positive as Na ions carry positive charge on it. Due to the entry of positively charged ions inside the cell, the cell becomes less negative and more positive. This is called depolarization of cell.