1. CHAPTER 3 - CELLS Animal Cell

2. 3 MAJOR PARTS OF CELL: NUCLEUS CELL MEMBRANE CYTOPLASM

3. NUCLEUS Directs overall cell activities Enclosed by nuclear envelope 2 Main Components: 1. Nucleolus: -Composed of RNA and Protein -Site of ribosome production 2. Chromatin: -Composed of DNA and Protein -Chromatin becomes chromosomes

4. CELL NUCLEUS

5. CELL MEMBRANE Maintains cell’s integrity Selectively permeable Made up of lipids, protein, & carbs Permeable to oxygen and carbon dioxide Impermeable to a.a., sugars & protein

6. CYTOPLASM Surrounds nucleus Cell membrane encloses cytoplasm Contains organelles suspended in a liquid called cytosol

7. ORGANELLES ENDOPLASMIC RETICULUM Communication and transportation Rough ER: Contain ribosomes Smooth ER: Lacks ribosomes

8. RIBOSOMES PROTEIN SYNTHESIS

9. GOLGI APPARATUS PACKAGES & DELIVERS PROTEIN Protein arrives in vescicles, moves through the layers of the golgi apparatus and is delivered to the outside of cell or to other organelles

10. MITOCHONDRIA POWERHOUSE-ENERGY!! Transforms energy into chemical form the cell can use

11. LYSOSOMES GARBAGE DISPOSAL OF CELL Releases enzymes that dissolve substances that are not needed by the cell

12. CENTROSOME DISTRIBUTES CHROMOSOMES TO THE NEW CELL Made up of 2 centrioles

13. CILIA FUNCTION IN MOVEMENT W/IN CELL Tiny, hairlike structures attached beneath cell membrane Hairs beat in succession to move fluids over surface of cell

14. CILIA AND FLAGELLA

15. FLAGELLA Function in movement of the cell from one location to another Only one per cell Example: Sperm cell

16. VESCICLES TRANSPORT VEHICLE Formed when part of the cell membrane folds over, pinches off and transports molecules into or out of the cell

17. VESCICLE

18. MICROTUBULES/ MICROFILAMENTS STRUCTURAL SUPPORT Example of Microtubules: Spindle fibers during cell division Example of Microfilaments: Actin & myosin in muscle contraction

19. MICROFILAMENTS AND MICROTUBULES

20. Cell Review Animal Cell Review