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Chapter 4 : Parts of a cell

Chapter 4 : Parts of a cell. Cell Theory: 1600’sRobert Hooke – discovered cells. Organells; parts or “organs” of cells. Nucleus: control center. Nuclear membrane Chromatin – DNA tangles Nucleolus – produces ribosomes. Plasma or Cell Membrane. Maintains homeostasis

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Chapter 4 : Parts of a cell

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  1. Chapter 4 : Parts of a cell Cell Theory: 1600’sRobert Hooke – discovered cells

  2. Organells; parts or “organs” of cells

  3. Nucleus: control center • Nuclear membrane • Chromatin – DNA tangles • Nucleolus – produces ribosomes

  4. Plasma or Cell Membrane • Maintains homeostasis • Controls what goes into and out of the cell

  5. Cell Wall – Plants and Fungus cells only • Function – protection and support • Made up of cellulose or chitin

  6. Cytoplasm • Material that organells are suspended into

  7. Endoplasmic Recticulum (ER) • Function – assembly and transport of proteins • Folded system of membranes • Two types of : • Rough ER- ribosomes • Smooth ER

  8. Golgi Complex • Function – receives proteins from ER, packages and ships proteins

  9. Lysosomes • Function – digestion, (worn out cell parts, food particles, invading bacteria)_

  10. Vacuole • Membrane bound organelle, bubble • Function – store food, store waste

  11. Mitochondria – Power House • Function: furnish energy by breaking down “food” • Production of ATP

  12. Chloroplasts – plants only • Function – photosynthesis, a type of plastid

  13. Cilia and flagella- movement • Allows cells to move • Cilia – short hairlike structures surrounding the cell • Flagella - tail

  14. Prokaryote No organells No nucleus Ex. Bacteria Eukaryote True cells Have a nucleus and membrane bound structure All other cells Two Types of Cells http://www.earthlife.net/prokaryotes/welcome.html

  15. Cell Size • Cells need surface area large enough to allow for the exchange of materials. • Which cell above has the most surface area? • Does it matter if a cells grows too large?

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