Cell membrane

• Biologie
• Middelbare school
• vwo
• Leerjaar 3

What does it mean to have a phobia?

1. To really like something
2. To be afraid of something
3. To want something
4. To be really great at something

Take 10 Qtips and lay them out on your piece of construction paper like a cell membrane.

Label the hydrophilic heads and the hydrophobic tails.

Take one piece of pasta and lay it in between your second and third Q-tip. Then take a second piece of pasta and lay it in between your sixth and seventh Qtips.  Label these transport protein channels.

Take your lentils and place 7 pieces on top of the Qtip line and 3 pieces below the Qtip line.

Label the top "outside the cell" and the bottom "inside the cell"

Diffuse the lentils across the membrane until equilibrium is reached.

Move your lentils so there are 5 on either side of the cell membrane line.  

Add 3 chickpeas outside the cell and 7 pieces inside the cell.  Since the chickpeas are larger, they can only move through the protein channels.

Use facilitated diffusion to create an equilibrium.

What is this solution called?

Use the lentils to represent water.

Use the chickpeas to represent glucose.

Create an hypotonic solution.

Raise your hand when finished.

Use the lentils to represent water.

Use the chickpeas to represent glucose.

Create an hypertonic solution.

Raise your hand when finished.