1. Bellwork: 11/6 Put phone up  Turn in cell packet Grab a new unit book
Week 11/5-11/9
Turn in cell packet
Grab a new unit book
Take out the cell video ?s

2. Objective
Finish the Cell Video
Unit III, pt I notes

3. Today:
The Cell Video
Choose groups
Unit III, pt I

4. This Week: Monday: The Cell Video Tuesday: Unit III, Pt. I Notes
Wednesday: Finish notes, organelle review, poster project
Thursday: Poster
Friday: Poster

5. Materials
Video ?s
Unit III Book

6. Homework
Bring in poster board
Due Thursday

7. Part 1: Cell Structure

8. Bacterium
Plants

9. Discovery Came with the invention of the microscope Key Findings:
Leeuwenhoek (1665)
Using a self-made microscope; first person to see living cells
Robert Hook (1665)
Looking at cork – first to coin term “cell”
Robert (1831), Scheiden (1838), Schwann (1839)
Collectively showed that plants and animals composed of cells
Rudolph Virchow (1855)
Cells arise from existing cells – Spontaneous Generation
Got credit for Robert Remak’s work

10. Cell Theory Three principles that all living things follow:
All living things are made up of cells
Cells are the basic unit of function for all living things
New cells arise from pre-existing cells

11. Exceptions Viruses: non-cellular
Chloroplasts & mitochondria: not cells; yet, have their own genetic information & can replicate

12. Examination of Cells Compound light microscope:
Uses a series of lenses to focus visible light rays
Visible light rays pass through the specimen
Creates a magnified image detected with human eye
Magnifies 1000x

13. Examination of Cells Transmission electron microscope:
Magnifies 100,000X
Used to examine the internal structure of cells-individual organelles (ex. Mitochondria)

14. Examination of Cells Scanning electron microscope:
Creates a 3-D image on a monitor
Used to examine surface topography of a specimen

15. Features of all Cells
Outer membrane: boundary separating inside from outside the cell
Cytoplasm: makes up the cell interior
Ribosomes: synthesizes proteins
DNA: provides instructions for…
Making proteins
Regulating cell activities
Reproduction

16. Two Cell Types Prokaryotic Cell Eukaryotic Cell Means “true nucleus”
Means “before nucleus”

17. Prokaryotic Cells Bacteria & Cyanobacteria
Considered the simplest cellular organism

18. Prokaryotic Cell Structure
Distinguishing characteristics:
Enclosed in an outer membrane
No internal membrane-bound organelles
Interior is one continuous compartment
No nucleus
DNA found in the nucleoid region
Most prokaryotes contain a cell wall
Different composition from plant cells
No internal support structure
No cytoskeleton
Support comes from cell wall

19. Eukaryotic Cells Found in plants, animals & fungi
Divided into 3 regions:
Outer membrane
Nucleus
Cytoplasm
Occupies volume between nucleus & outer membrane

20. Eukaryotic Cell Structure
Distinguishing characteristics:
Interior compartmentalized
Membranous and non-membranous organelles
Each have specific functions within the cell
Nucleus
Membrane-bound organelle that houses the DNA
Cell walls limited to certain types
Plant cells, some fungi
Some protists (ex. Paramecium)

21. Think-Pair-Share
Use a Venn diagram to show how Prokaryotic and Eukaryotic cells are alike and how they are different
Use at least 2 concepts in each compartment of the diagram
Be ready to share!!

22. Eukaryotic Cell Structure
Further classified into:
Plant cells
Animal cells

23. 2 Types of Eukaryotic Cells
Animal Cell
Distinguishing Characteristics:
No cell wall
Lysosomes-digestive organelle; breaking down macromolecules and worn-out organelles
Centriole-involved in microtubule organization

24. 2 Types of Eukaryotic Cells
Plant Cell
Distinguishing Characteristics:
Has cell wall – also found in fungi & some protists
Large central vacuole – involved in storing metabolites and water
Plastids – varied functions

25. Chloroplasts Found in plants & algae Site of photosynthesis
Converts sunlight to chemical energy used to synthesize sugars from CO2 and water

26. Plastids
Chloroplasts are a specialized member of a family of organelles called plastids
Several specialized types
Leucoplast – colorless, synthesizes and stores starch
Found in roots and tuber
Chromoplast – stores pigments
Responsible for color in autumn leaves, fruits and some flowers

27. Central Vacuole Involved in Storage
Holds reserves of organic compounds
Stores byproducts that would be toxic to the cell
Stores pigments
Growth
Fills with water that pushes cytoplasm against cell wall
If cell wall has capability to loosen, cell wall will expand

28. Answer ?s in your Note Guide: