Semipermeable means only certain substances can pass through. I imagine you are talking about cell membranes which are semipermeable. This means vital things like oxygen and nutrients are able to pass through the membrane, while not allowing everything to enter the cell
Depolarization and repolarization are part of the action potential.
C. Action potential
.Oxygen free environments
.Concentrated salt water and hot
. Acidic water of sulfur springs
Which items are sources of soil pollution
Answer:plastics