Separating intracellular fluid from extracellular fluid ensures the relative stability of the internal environment of the cell

The cell membrane and various membranous structures within the cell all have the same basic structural form similar to a triple plate, which is called...

Protein 55%

Lipids

Sugar 3%

pedestal

Protein embedded in it

Sugar molecules bind to lipids and proteins and attach to the outer surface of the membrane

power

condition

Ion diffusion is also affected by the electric field force on both sides of the membrane

Passive transport (small molecules, no energy consumption)

(3) Active transport

(4) Membrane vesicle transport