Cell Membrane & Transport Animations:
Fluid Mosaic Model, Jesse Gray
- _____________ are the primary determinants of membrane structure, while ________________ carry out membrane function.
- Describe the five functions of membrane functions:
- Describe the different types of membrane lipids:
- What and why is the membrane held together?
- Describe four factors influencing membrane fluidity:
- Why don’t lipids and proteins flip-flop through the bilayer?
Other Membrane Resources:
Passive Transport: Diffusion & Osmosis
How Diffusion Works. Answer questions below.
- Even in a lump of sugar, what do molecules do?
- How is diffusion defined? (Use concentration gradient in your answer).
- Draw a diagram to explain diffusion.
How Facilitated Diffusion Works. Answer questions below.
- What does the protein do in facilitated diffusion?
- How much energy does facilitated diffusion require? (There must be a concentration gradient for particles, like amino acids, to move with diffusion).
- Draw a diagram to explain facilitated diffusion.
How Osmosis Works, answer the following questions below.
- How is osmosis different than other forms of diffusion?
- What particles move in what direction during osmosis?
- How does this compare to diffusion?
- What happens to water molecules in an isotonic solution?
How the Sodium-Potassium Pump Works Answer questions below.
- What must be supplied to move sodium and potassium across the cell membrane from low concentration to high concentration?
- Is this example passive or active transport?
- How is this different than diffusion or osmosis?
- View the Example of the Sodium-Potassium Pump (click on active transport). Draw a diagram or write a description of the example to explain active transport.
Endocytosis & Exocytosis:
View the McGraw Hill Animation and YouTube Video
- Describe the steps of endocytosis (a drawing may be helpful):
- Describe what takes place in exocytosis (a drawing may be helpful):
- Real Life Endocytosis Example (Amoeba Feeding). Explain how this amoeba (the blob) feeding represents endocytosis.
Cell to Cell Communication Example: Utah Genetics
Describe the role and process of cell to cell communication.
This is just entertaining and well done:
Plasma Membrane Rap