Cell transport · Cozy management sim
Membrane Market
You have inherited the harbour office of a small cell-town. Every morning molecules queue at the sea wall with requests: let me in, let me out, pump me uphill. Answer them well, earn coins, and grow the town before the Harvest Festival.
- 9 concepts
- 11 exercises
- About 10 minutes
- Before & after check
Built from the study material “Biology Unit 3: Cell Membranes and Transport”. The lessons and exercises below come from that material. Upload your own notes to get a game like this one.
What you'll learn
Unit 1 · The membrane and selectivity
Phospholipid bilayer
The student can describe the bilayer's structure and explain why it is a barrier to polar and charged substances.
Selective permeability
The student can predict whether a molecule crosses freely, needs a channel or carrier, or needs a pump.
Unit 2 · Passive transport
Diffusion
The student can explain diffusion as the net result of random motion down a concentration gradient.
Osmosis
The student can predict the direction of water movement from the solute concentrations on each side.
Tonicity: hypotonic, isotonic, hypertonic
The student can classify a solution as hypotonic, isotonic, or hypertonic relative to a cell and predict the cell's fate.
Facilitated diffusion
The student can distinguish facilitated diffusion from simple diffusion and from active transport.
Unit 3 · Active transport
Active transport
The student can explain why moving a substance against its gradient requires ATP and give an example.
The sodium-potassium pump
The student can state what the sodium-potassium pump moves, in which directions, and why it matters.
Unit 4 · Bulk transport
Endocytosis and exocytosis
The student can order the steps of endocytosis and exocytosis and explain why both are active processes.
Exercises
You'll meet these in order as you play. Each one uses the concept as the rule.
- Exercise 1LessonNot completed
Three chests describe the vault's outer wall. One is a mimic. Which claim about the membrane is false?
Phospholipid bilayer
- Exercise 2LessonNot completed
Molecules approach the membrane. Route each one: through the bilayer on its own, through a transport protein, or blocked entirely.
Selective permeability
- Exercise 3LessonNot completed
A drop of dye lands in still water. Put what happens next in order. One step is a myth.
Diffusion
- Exercise 4LessonNot completed
A new lab apprentice watched a cell swell in pond water and wants to know why. Explain it to them.
Osmosis
- Exercise 5LessonNot completed
Cells drift past in different solutions. Hit each one with the right label before it passes.
Tonicity: hypotonic, isotonic, hypertonic
- Exercise 6LessonNot completed
More cargo at the gates. Route each case: passive (no ATP, even with a protein) or active (ATP against the gradient).
Facilitated diffusion
- Exercise 7LessonNot completed
The glucose carrier has to pull sugar uphill. Connect each link in the chain that powers it.
Active transport
- Exercise 8LessonNot completed
The sodium-potassium pump needs rewiring. Link each part of one cycle to its value.
The sodium-potassium pump
- Exercise 9ReviewNot completed
Review wave: for each cell, which way does the water move? Answer before it drifts by.
Osmosis
- Exercise 10LessonNot completed
The great door only opens if the planks show how a large particle gets INTO the cell. One plank doesn't belong.
Endocytosis and exocytosis
- Exercise 11ChallengeNot completed
The Gatekeeper dumps a mixed cargo at your feet. Sort every item by how it crosses the membrane, or the nucleus stays sealed.
Active transport · Facilitated diffusion