1. Think positive…
Essential Question: How do each of the organelles in a cell function?

2. 1/13/12-Get your book. Set out your plant/animal diagrams.
Do-Now:
Provide the FUNCTION of the following cell parts.
Nucleus f. Endoplasmic Reticulum
Nucleolus g. Golgi Apparatus
Cell membrane h. vacuole
Cell wall i. lysosome
Mitochondria j. chloroplast

3. Cell Membrane The entire cell is surrounded by a thin membrane.
Function: controls which substances pass into & out of the cell–it’s selectively permeable

4. (Cell membrane continued)
Structure: composed of phospholipids & proteins in a double layer or bilayer

5. Each phospholipid has a polar “head” & two non-polar “tails”
(Cell membrane continued)
Each phospholipid has a polar “head” & two non-polar “tails”
The head of the phospholipid is hydrophilic & the tails are hydrophobic.
Head
Tails

6. Floating around in the cell membrane are different kinds of proteins.
(Cell membrane continued)
Floating around in the cell membrane are different kinds of proteins.
This model is called the fluid mosaic model. The positions of the lipids & proteins is constantly changing.

7. Organelles:
Cytoplasm: lies between the cell membrane & the nucleus & contains the various organelles of the cell.
cytoplasm

8. Endoplasmic reticulum (ER)- functions as intercellular highway for molecules to move from one part of the cell to another
Endoplamsic reticulum

9. There are two types of ER
Endoplasmic reticulum continued
There are two types of ER
a. Rough ER –has ribosomes on it, transports proteins in the cell
b. Smooth ER – no ribosomes, produces lipids
Rough ER
Smooth ER

10. vesicle budding from rough ER ribosome vesicle (mitochondrion)
space inside smooth ER
Fig. 4.14, p. 65

11. Ribosomes –make proteins, attached to the ER or float freely in the cytoplasm

12. Golgi Apparatus- packages proteins for secretion out of cell

13. ROUGH ER SMOOTH ER GOLGI BODY vesicle from ER, about to fuse with
the Golgi
membrane
internal space
budding
vesicle
Fig. 4.15, p. 65
0.25 µm

14. Lysosomes – produced by Golgi; contain strong digestive enzymes;suicide sac

15. Mitochondria – powerhouses of the cell; produce ATP (energy)

16. Chloroplasts – found in organisms that carry on photosynthesis

17. Microfilaments Microtubules
Cytoskeleton: a network of long protein strands that gives the cell support & movement.
2 types:
Microfilaments Microtubules

18. Components of the Cytoskeleton
Microtubules
Help with cell division & movement
Microfilaments
Help with movement & shape

19. Cilia & Flagella
-hairlike structures, extend from surface of cell, assist in movement

20. vacuoles- storage of food, enzymes & wastes

21. The Nucleus- control center
Separated from the cytoplasm by nuclear envelope (double membrane)
Contains fine strands of chromatin (DNA) which will coil up to form chromosomes
Large dark structure –nucleolus(RNA)

22. 1/17/12 Do-Now: Take out your plant/animal cell wkst.
How are the cell & nuclear membranes similar? Different?
Give the FUNCTION of the following organelles.
a. nucleolus
b. flagella
c. lysosome

23. Differences in Plant and Animal Cells
A Plant Cell
An Animal Cell

24. Differences in Plant and Animal Cells

25. -cell walls made of cellulose in addition to membranes
Plant cells have:
-cell walls made of cellulose in addition to membranes
Provide structure &
support

26. vacuole Plant cells have:
-a large central vacuole which provides turgor pressure
vacuole

27. Plant cells have:
Plastids to store food or pigments
Leukoplasts – white – store starch
Chromoplasts – red, yellow, blue
Chloroplasts - green

28. Animal cells have… centrioles (during cell reproduction)
Small vacuoles (if at all)
lysosomes

29. 1/18/12-Get your book & take out your homework.
Do-Now:
1. If a cell were a city, what organelles would represent the following things?
City Hall b. Power Plant
c. Waste Management d. UPS
2. If a cell were a factory, what organelles would represent the following things?
Main Office b. Doors
c. Generator d. Packaging Center

30. 8/31/10-Pick up the book that matches your desk number.
Do-Now: Pick up & complete the word search on the shelf. Small Group Review tomorrow before school. See me for a pass.
Test TOMORROW
GRECHO, Cell Theory, 5 Scientists, Cell Structures & Functions
~55 questions
True/False MC
Short Answer
Fill In