2. CELLS …..as units of Life. Ch. 7.1 A View of the Cell

3. CELLS  Basic units of:  Structure and  Function  of all living things.

4. WHAT DO WE MEAN BY:  STRUCTURE ?  FUNCTION ?

5.  STRUCTURE= HOW IT IS BUILT/CONSTRUCTED.  FUNCTION= WHAT IT DOES, HOW IT WORKS.

6. The Cell Theory:  All organisms are composed of one or more cells  The cell is the basic unit of organization for the organism  All cells come from pre- exiting cells

7. Two basic cell types: Prokaryotic & Eukayotic Prokaryotic cells  Earliest cells  Lack membrane bound organelles  No nucleus  No mitochondria  Have membrane, cytoplasm & free DNA :

8. An Organelle Is: A minute structure within a plant or animal cell that has a particular job or function.

9. Prokayrotic cells: Bacteria

11. Eukaryotic cells:  May have evolved from Prokaryotic  Have a nucleus that holds the DNA inside a membrane  Have mitochondria  Also have cell membrane & cytoplasm

12. What are some differences between animal and plant cells? ANIMAL PLANT Nucleus Mitochondria

13. Human muscle cells With large nuclei

14. Eukaryotic Cells: are found in animals like Paramecium Nucleus With DNA For reproduction

15. Mitochondria = where energy is released The power house of the cell: ATP Has a membrane like The nucleus

16. Exception: A Eukaryotic Cell With NO NUCLEUS !

20. What are some differences between animal and plant cells? ANIMAL PLANT

21. Organelles found only in Plants: Cell Walls Cellulose Chloroplasts

22. Plant Cell  Chloroplast= absorbs light, changes light energy into chemical energy for photosynthesis = GREEN  Cell Wall= forms rigid outer structure, made of cellulose (fiber)  Cellulose = carbohydrate found in cell walls

23. PLANT CELL Cell wall Large vacuole Chloroplast

24. Diatoms Both plants & protists have: chloroplasts cell walls cellulose Plant cells

25. Animal Cell No Wall, Just a Cell Membrane

26. Centrioles = involved in cell division Organelles found only in Animal cells:

27. Found in both Plant and Animal Cells Organelles that surround cells for support: Cytoskeleton = gives structure to a cell Cell Membrane= Semi-permeable, controls what enters and leaves the cell, outer containment envelope.