1. THE CELL
Cells are mainly formed of water, but present in their structure are proteins, carbohydrates, and nucleic acids (DNA).
Structure
Cell membrane
Cell wall
Nucleus

2. THE CELL
Cell Membrane
Separates the parts inside the cell from the outside
Support for the cytoskeleton, shape for the cell
Substances pass through it
Cell communication

3. THE CELL Cell Wall Strength and rigidity Protection Retains water
It is different between eukaryotes and prokaryotes and plants and fungi

4. THE CELL
Workshop
Make a scheme where you compare all the different types of cells there are.
List the differences between the cell wall and the cell membrane
HOMEWORK:
Bring information about the cell organelles and its functions.
In groups: classify the organelles of the cell according to the processes related to their functions.

5. THE CELL
ANIMAL
CELL

6. THE CELL
PLANT
CELL

7. THE CELL Organelles In groups:
Each member of the group brings information of the cell’s organelles and their function.
Discuss about how those organelles and structures influence the function of the cells. Write your conclusions.
Make a scheme or model of a plant and animal cell indicating all its organelles and functions.
The synthesis

8. THE CELL - Transport
Cell Membrane  Phospholipids have both hydrophilic and hydrophobic regions: nonpolar tails (hydrophobic), polar heads (hydrophilic)
Pg 85

9. THE CELL - Transport
Cell Membrane  It also has proteins in the membrane, which function is regulate the movement of some substances
Pg 86

10. THE CELL - Transport PASSIVE TRANSPORT Release wastes and take
in some substances
PASSIVE TRANSPORT
Cell membrane: acts as
selectively permeable
screen.
Movement of molecules
between areas of different
concentrations

11. PASSIVE TRANSPORT: no energy is needed
THE CELL - Transport
PASSIVE TRANSPORT: no energy is needed
Diffusion: movement of molecules -like oxygen- from areas of high concentration to areas of low concentration.
Osmosis: movement of WATER through a semipermeabe membrane from areas of lower concentrations to areas of higher concentrations.

12. THE CELL - Transport Solutions can be:
Isotonic: same concentrations, there is an equilibrium
Hypotonic: lower concentrations of dissolved solutes on the outside, therefore water moves into the cell
Hypertonic: higher concentrations of dissolved solutes on the outside, therefore water moves out of the cell

13. THE CELL - Transport

14. Active Transport: energy is needed
THE CELL - Transport
Active Transport: energy is needed
Allows the movement of molecules from an area of low concentration to an area of high concentration. THIS REQUIRES ENERGY!!  sodium - potassium pump  
Endocytosis: membrane surrounds the molecule that is going to be taken inside…  
Exocytosis: membrane surrounds the molecule that is going to be pushed outside…  

15. THE CELL Presentations: PHOTOSYNTHESIS, RESPIRATION, FERMENTATION
Instructions:
Explain the process
Prepare an activity related to the topic

16. References http://library.thinkquest.org/3564/