Cell Membrane: Structure and Transport

Okay so the cell membrane is basically the cell’s personal boundary and emotional support system.

It decides who comes in, who leaves, and who stays outside forever.

It’s made of two layers of phospholipids, and each phospholipid has a head that loves water and

tails that hate water. Since there’s water both inside and outside the cell,

the heads face the water and the tails hide in the middle, which is why the membrane is stable.

This structure makes the membrane semi-permeable, meaning it lets some things through but blocks others.

Inside the membrane there are proteins doing all the work. Some proteins form channels,

which are like tiny tunnels that let specific small particles pass through quickly without energy.