Membrane Structure

This assignment was locked Feb 19, 2023 at 11:59pm.

Learning Objectives

After watching this video, you should be able to

- Draw and label the parts of a cell membrane: phospholipids, fatty acid tails, phosphate heads, transport proteins, cytoskeleton
- Explain how the phospholipid bilayer (structure) determines which molecules can cross directly through the membrane and which need to be transported across via proteins or endo/exocytosis (function).

Practice your understanding by answering these questions.

1. draw and label parts of cell membrane

2. Fill in this chart

Type of molecule	Method of crossing the membrane	Why?
small non-polar molecules (O2, CO2, H2O)
medium sized non-polar molecules (fatty acids)
medium sized polar molecules ( sugar, amino acids, ions like Calcium)
very large molecules (proteins, carbohydrates)