cells presentation

1. Chapter 3 – Cells (Cytology)

2. Learning Objectives
• Describe the properties of a cell.
• Identify the components common to all cells.
• Compare and contrast the cells that characterize the three domains of life.
• Explain how the chemical structure of phospholipids enables them to form a
bilayer in water.
• Explain why a biological membrane has selective permeability.
• Identify different functions of membrane proteins.
• Identify the functions of the organelles in eukaryotic cells.
• Describe how organelles interact in carrying out a cell’s function.
• Compare and contrast the structure and function of cytoskeletal proteins.
• Compare and contrast different cell junctions in animal cells.
• Explain the function of plasmodesmata in plant cells.

3. All Organisms Are
Composed of Cells
Section 3.1
A cell is the smallest unit of life
that can function independently.
Amoeba © Wim van Egmond/Visuals Unlimited

5. All Organisms Are
Composed of Cells
Section 3.1 Table 3.1
Cell theory explains the prevalence and commonalities of cells.
Filamentous cyanobacteria and green alga © McGraw-Hill Education/Don Rubbelke, photographer

7. Prokaryotes

8. The Anatomy of a Bacterium
Section 3.2 Figure 3.6
Bacteria are
prokaryotic.
DNA is free in
the cytoplasm.

9. Eukaryotes

11. The Anatomy of an Animal Cell
Section 3.2 Figure 3.8
Animal cells are
eukaryotic. They
have membrane
bounded
organelles.

12. The Anatomy of a Plant Cell
Section 3.2 Figure 3.9
Plant cells are
also eukaryotic,
but notice the
cell wall and
chloroplasts.

18. Eukaryote Cell Structures and
Functions

19. Eukaryotic Organelles Divide Labor
Section 3.4 Figure 3.13
The nucleus, ER, and
Golgi interact to
secrete substances,
such as milk proteins.

23. Ribosomes

24. A Cytoskeleton Supports Eukaryotic Cells
Section 3.5 Figure 3.25
The cytoskeleton is a
network of protein
tracks and tubules. It
has several functions:
•Structural support
•Aids in cell division
•Organelle transport
•Cell movement

30. Peroxisomes

35. Vesicles

37. Centrosome

38. Specialized plant cell organelles

45. Cells Stick Together and Communicate
Section 3.6 Figure 3.27
Anchoring junctions use
intermediate filaments to
hold cells together.
Tight junctions fuse the
membranes of adjacent
animal cells together,
preventing substances from
flowing between the cells.
Gap junctions connecting
animal cells are analogous to
plasmodesmata. A protein
channel links the cytoplasm
of neighboring cells.