General Biology I · Module 4 · Membranes and transport

Membranes Walkthrough

Watch phospholipids build a bilayer, proteins drift and change shape, water rush into and out of cells, a pump trade sodium for potassium and whole vesicles carry cargo in and out. Go at your own pace. Nothing here is graded.

Speed

Think of it like this

Quick check

Wrong answers are fine here. Read why, then try again.

Dr. Akash Garg · General Biology I Study Tools · Drawings are simplified and not to scale. CC BY-NC-SA 4.0
Use the left and right arrow keys to move between steps. Molecule motion is slowed down or sped up so you can follow it; real molecules move far faster. Practise next in the Membranes Lab.