how does a bacterium cell wall protect it?

Answer 1

Bacteria, like all cells, has a plasma membrane, but they also have a cell wall, which is composed of peptidoglycan. It protects the bacteria because it is a hard, outer shell which prevents the actual cell membrane from being exposed completely to the external membrane.

And ion channels aren't found in the cell wall, it's found in the cell membrane. Ions do pass through holes in the cell wall though.

Answer 2

I dont think bacterium have cell walls. Only plants have cell walls. Bacterium have membranes. The membranes keep the cytoplasm from oozing everywhere. They mostly hold the bacterium together.

Answer 3

As far as I know...

The cell wall or cell membrane is covered in ion channels that regulate what chemicals come into and out of the cells via osmosis.

Ion channels are pumps that can lock to stop chemicals comming and in or unlock to allow them in and this is something that will occur because of the chemical status inside the cell.

Answer 4

Basically it is the skin of the bacteria, performing a huge amount of functions. It stops the cell from dehydrating, and acts as the alimentary (digestive) system.