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Plasma membrane

ANIMAL CELL. Smooth endoplasmic reticulum. Nucleus. Rough endoplasmic reticulum. Flagellum. Not in most plant cells. Lysosome. Centriole. Ribosomes. Peroxisome. Golgi apparatus. Microtubule. Plasma membrane. Cytoskeleton. Intermediate filament. Microfilament. Mitochondrion.

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Plasma membrane

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  1. ANIMAL CELL Smooth endoplasmicreticulum Nucleus Roughendoplasmicreticulum Flagellum Not in most plant cells Lysosome Centriole Ribosomes Peroxisome Golgiapparatus Microtubule Plasma membrane Cytoskeleton Intermediatefilament Microfilament Mitochondrion Figure 4.5A

  2. Roughendoplasmicreticulum Nucleus Ribosomes Smoothendoplasmicreticulum Golgiapparatus Microtubule Centralvacuole Not inanimalcells Intermediatefilament Cytoskeleton Chloroplast Microfilament Cell wall Mitochondrion Peroxisome PLANT CELL Plasma membrane Figure 4.5B

  3. CELL THEORY Proposed in 1838 by Schleiden & Schwann • All life forms are made from one or more cells. • Cells only arise from pre-existing cells. • The cell is the smallest form of life. CELL TIMELINE

  4. CELLULAR ORGANIZATION Body system level: the digestive system Organism level: the whole body Organ level: the stomach Tissue level: layers of tissue in the stomach wall Cellular level: a cell in the stomach lining Chemical level: a molecule in the membrane that encloses a cell

  5. PROKARYOTIC CELLS • NO NUCLEUS • Small, simple • A prokaryotic cell is enclosed by a plasma membrane and is usually encased in a rigid cell wall • The cell wall may be covered by a sticky capsule • Inside the cell are its DNA and other parts • Grow & reproduce • EX. E. coli (bacterial cells)

  6. EUKARYOTIC CELLS • HAVE A NUCLEUS & MEMBRANE-BOUND ORGANELLES • Grow & reproduce • Some live as single cells • Examples: Plants, animals, fungi, etc.

  7. CELL WALL Function: provide support and protection for the cell; allows water, oxygen, carbon dioxide and other things to pass through FOUND ONLY IN PLANT CELLS

  8. NUCLEUS Function: controls most cell processes an contains hereditary info of DNA; has chromatin which forms chromosomes during mitosis Location: near the center of the cell Found in all EUKARYOTIC cells

  9. NUCLEOLUS Function: Location where ribosomes are made Location: WITHIN the nucleus. Found in all EUKARYOTIC cells

  10. CHROMATIN CHROMOSOMES Description: DNA bound to proteins that is visible within the nucleus Location: WITHIN the nucleus. Description: Condensed chromatin, distinct, thread-like structures containing genetic information. Location: WITHIN the nucleus. Found in all EUKARYOTIC cells

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