Go to Section: The Cell Theory All living things are composed of cells. Cells are the basic units...

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Transcript of Go to Section: The Cell Theory All living things are composed of cells. Cells are the basic units...

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The Cell Theory

All living things are composed of cells.Cells are the basic units of structure and function in living things.New cells are produced from existing cells.

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Prokaryotic Cells

Bacteria and cyanobacteriaNo true nucleus; lacks nuclear envelopeGenetic material in nucleoid regionNo membrane-bound organelles

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Eukaryotic Cells

Plants, animals, fungi, protistsTrue nucleus; bounded by nuclear envelopeGenetic material within nucleusContains cytoplasm with cytosol and membrane-bound organelles

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Prokaryotic Cell

Cell membrane

Cell membrane

Cytoplasm

Cytoplasm

Nucleus

Organelles

Eukaryotic Cell

Section 7-1

Prokaryotic and Eukaryotic CellsComparison of Prokaryotic and Eukaryotic Cells

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Prokaryotic Cell

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Animal Cell

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Plant Cell

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Prokaryotes Eukaryotes

Cell membraneContain DNA

NucleusEndoplasmic reticulum

Golgi apparatusLysosomesVacuoles

MitochondriaCytoskeleton

Animal Cells Plant Cells

Centrioles

Cell membraneRibosomes

NucleusEndoplasmic reticulum

Golgi apparatusLysosomesVacuoles

MitochondriaCytoskeleton

Cell WallChloroplasts

Section 7-2

Venn Diagrams

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Nucleus

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Ribosomes – builds cell’s proteins

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Functions of the Endoplasmic Reticulum

Smooth ERSynthesizes lipids, phospholipids and steroidsParticipates in carbohydrate metabolismDetoxifies drugs and poisonsStores calcium ions necessary for muscle contraction

Rough ERManufactures proteins that are secreted and membranes

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Golgi apparatus – finishes, sorts, and ships many products of the cell

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Lysosome – digestive compartments

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Formation and Function of Lysosomes

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Plant Cell Vacuole – stores compounds

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Mitochondrion – site of cellular respiration

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Chloroplast – site of photosynthesis

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Structure and Function of the Cytoskeleton

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Motor Molecules and the Cytoskeleton

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Plant Cell Walls – protect cells, maintain shape, prevent excess water uptake

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Animal Cell Plasma Membrane