The immediate environment of a cell is the extracellular fluid or tissue fluid. It allows a continual exchange of materials into and out of the cell
when body systems work together to ensure that the cellular environment is kept constant is called homeostasis. Kept at constant temperature and constant concentration
Substances that all cells require : glucose and oxygen. It produces carbon dioxide, water and energy which need to be removed
the cell membrane is represented through a fluid mosaic model because it is made up of many different molecules and is constantly changing position
main structure of membrane is formed from phospholipid molecules which are lipid molecules containing a phosphate group.
phospholipids are arranged in two layers known as a bilayer. Phospholipid head which is hydrophilic (loves water) and a tail that is hydrophobic (hates water)
