1. Chapter 7 Cellular Structure and Function
Section 1: Cell Discovery and Theory
Section 2: The Plasma Membrane
Section 3: Structures and Organelles
Section 4: Cellular Transport

2. All organisms are composed of one or more cells.
Chapter 7
Cellular Structure and Function
7.1 Cell Discovery and Theory
The Cell Theory
All organisms are composed of one or more cells.
cell is the basic unit of structure and organization of organisms.
All cells come from preexisting cells.

3. use a series of glass lenses and light to magnify an image
Chapter 7
Cellular Structure and Function
7.1 Cell Discovery and Theory
Light Microscopes
use a series of glass lenses and light to magnify an image
Magnifies images up to 1,000x the actual size

4. Uses magnets to aim a beam of electrons at a cell to produce an image
Chapter 7
Cellular Structure and Function
7.1 Cell Discovery and Theory
Electron Microscopes
Uses magnets to aim a beam of electrons at
a cell to produce
an image
Magnifies images up to 500,000x the actual size
9560x
Microscopy Links

5. Contains a plasma membrane
Chapter 7
Cellular Structure and Function
7.1 Cell Discovery and Theory
Prokaryotic Cell
Simple structure
Contains a plasma membrane
Does not contain membrane-bound organelles
11,000x

6. More complex structure
Chapter 7
Cellular Structure and Function
7.1 Cell Discovery and Theory
Eukaryotic Cell
More complex structure
Contains a plasma membrane
Contains membrane-bound organelles
400x

7. Thin, flexible boundary between the cell and its environment
Chapter 7
Cellular Structure and Function
7.2 The Plasma Membrane
Plasma Membrane
Thin, flexible boundary between the cell and its environment
Allows nutrients into the cell
Allows waste to leave the cell

8. Selective Permeability
Chapter 7
Cellular Structure and Function
7.2 The Plasma Membrane
Selective Permeability
Plasma membrane controls movement of
substances into
and out of the cell.
Also controls the amount of a substance entering and leaving the cell

9. Plasma membrane is made of the phospholipid bilayer.
Chapter 7
Cellular Structure and Function
7.2 The Plasma Membrane
Plasma membrane is made of the phospholipid bilayer.
A phospholipid molecule is composed of a glycerol backbone, two fatty acid chains, and a phosphate group.

10. Chapter 7
Cellular Structure and Function
7.2 The Plasma Membrane
Fluid Mosaic Model
Phospholipid bilayer allows other molecules to “float” in the membrane.
Other Components
Proteins
Cholesterol
Carbohydrates

11. Transmit signals inside the cell Act as a support structure
Chapter 7
Cellular Structure and Function
7.2 The Plasma Membrane
Proteins
Transmit signals inside the cell
Act as a support structure
Provide pathways for substances to enter and leave

12. Prevents fatty acid tails from sticking together
Chapter 7
Cellular Structure and Function
7.2 The Plasma Membrane
Cholesterol
Prevents fatty acid tails from sticking together

13. Identify chemical signals
Chapter 7
Cellular Structure and Function
7.2 The Plasma Membrane
Carbohydrates
Identify chemical signals

14. Chapter 7
Cellular Structure and Function