Download _____ Name Date ______ Mrs. G-M (Biology) Period ______ List of

# _____ Name __________________________
Date ____________
Mrs. G-M (Biology)
Period ___________
List of Topics to Know for Unit 4—The Cell & Its Environment
Cells & Cell Theory
 Who first observed cells?
o What was he looking at?
o Did he see live cells?
 What are the 3 parts of cell theory?
Cell (plasma) membrane structure
 What are the 2 main functions of the cell (plasma) membrane?
o What does it mean that the membrane is “selectively permeable”/“semi-permeable”?
 In general, what does the cell (plasma) membrane look like?
 What does the cell (plasma) membrane look like in more detail?
o Be able to sketch/identify a detailed view (“Fluid Mosaic Model”) of a cell membrane and label the parts.
Movement of materials across the cell membrane
 What is passive transport?
o Does it require energy? Why/why not?
 What can passive transport be compared to?
o Examples of passive transport…
 During diffusion, which way do the molecules of the solute move?
 During diffusion, do the molecules ever completely stop moving?
 What does “dynamic equilibrium”/“no net movement” mean?

What is osmosis?
o Why is it important?

Define “isotonic solution”.
o Be able to:
 Sketch a cell in an isotonic solution.
 Label the amount of solute (ex. salt) and water inside the cell and outside the cell.
 Show which way will the water move and explain why it moves that way.
 What will happen to the size/shape of the cell?

Define “hypotonic solution”.
o Be able to:
 Sketch a cell in a hypotonic solution.
 Label the amount of solute (ex. salt) and water inside the cell and outside the cell.
 Show which way will the water move and explain why it moves that way.
 What will happen to the size/shape of the cell?
o What saying can you use to remember what happens in a hypotonic solution.
# _____ Name __________________________
Date ____________
Mrs. G-M (Biology)
Period ___________
List of Topics to Know for Unit 4—The Cell & Its Environment

Define “hypertonic solution”.
o Be able to:
 Sketch a cell in a hypertonic solution.
 Label the amount of solute (ex. salt) and water inside the cell and outside the cell.
 Show which way will the water move and explain why it moves that way.
 What will happen to the size/shape of the cell?
o What saying can you use to remember what happens in a hypertonic solution.

What is the role of vacuoles in cells (in general)?
o …in plant cells?
o …in freshwater protists (ex. Paramecium)?
 Why do some protists need “contractile vacuoles”?

What is facilitated diffusion?/When is it needed?
o What helps out during facilitated diffusion?
o Does facilitated diffusion require energy? Why/why not?

What is active transport?
o Does active transport require energy? Why or why not?
 What can passive transport be compared to?
o …examples of active transport?
o What allows for the movement of molecules against the concentration gradient during active transport?
o What is the result of active transport?

When materials can’t pass through the membrane, which processes can they use to get into/out of the cell?
o Describe what happens during endocytosis./Which way do materials move during endocytosis?
 What are the two types of endocytosis?
 Does endocytosis require energy? Why or why not?
o Describe what happens during exocytosis./Which way do materials move during exocytosis?
 Does exocytosis require energy? Why or why not?
The Cell Wall
 What is the cell wall?
o What types of organisms have cells with cell walls?
o What are cell walls made of?
o What does the cell wall do for the cell?
o Do cell walls affect a cell’s permeability?