Build a Semipermeable Membrane
CLASSROOM COPY
Requirements: The model must be a 3D model representing the structure and function
of a cell membrane. Use the Cell Membrane and Transport reading to help. Think
about the function of the structure when choosing materials. Use the materials
provided to model. The model must include the following.
A model (10 Points)
 Model should show the lipid bilayer with the following labels- cytoplasm (inside the
cell), outside the cell, phospholipid bilayer, protein channels, hydrophilic phosphate
group, and hydrophobic tails.
Key (5 points)
 Include a key with the components of the cell membrane and the molecules moving
through the membrane.
Explanation of the function of each portion of the molecule using bullet points. (10
points)
 The function of the cell membrane.
 What represents the phospholipids?
 What parts of the model represent the hydrophilic phosphate head and the
hydrophobic tail? Which direction in the cell would each orient and why?
 Which molecule represents the simple diffusion- describe the requirements of
simple diffusion- method of molecule movement and energy requirements.
 Which channel and molecule represents facilitated diffusion – describe the
requirements and a molecule that can move through the membrane in this way.
 What represents the aquaporin and what molecules is traveling through this
channel? Describe
 What molecule represents the molecular transport. What channel and what are the
requirements? Is the energy modeled? How?
 What molecule represents the endocytosis and/or exocytosis of wastes- show a
vesicle. Is the energy modeled?
 Label those that require energy with energy molecule.
Grading Rubric for Model
Names:
Requirements
Possible Points
Points Earned
Comments
Model
10
Key
5
Explanation
10
Key
5
Explanation
10
Key
5
Explanation
10
Grading Rubric for Model
Names:
Requirements
Possible Points
Points Earned
Comments
Model
10
Grading Rubric for Model
Names:
Requirements
Possible Points
Points Earned
Comments
Model
10