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Plasma Membrane

Plasma Membrane. Cells must control the materials that enter and leave. The PM is the . Homeostasis. Homeostasis is the process of maintaining the . Selective permeability is the process where a cell allows into the cell and . PM Structure. PM is made of a phospholipid bilayer

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Plasma Membrane

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  1. Plasma Membrane • Cells must control the materials that enter and leave. • The PM is the

  2. Homeostasis • Homeostasis is the process of maintaining the . • Selective permeability is the process where a cell allows into the cell and .

  3. PM Structure • PM is made of a phospholipidbilayer • Two phospholipid layers • Hydrophilic – “” water • Hydrophobic – “” of water

  4. Transport across the PM • Fluid Mosaic Model • Transport Proteins

  5. Cell Wall • that provides the cell and • Located right next to the cell membrane • Think and membrane

  6. Control Centers The Nucleus and Ribosomes

  7. Nucleus • The nucleus contains the for the cell • Chromatin • Double membrane • Nuclear pores

  8. Ribosomes • Ribosomes control • Made by the nucleolus • Found floating freely in the or on the rough endoplasmic reticulum

  9. Assembly, Transport & Storage Other organelles

  10. Endoplasmic Reticulum • Site of in the cells • ER • Covered in ribosomes • ER • No ribosomes

  11. Golgi Apparatus • and products of the ER • Sends packaged proteins to various locations around the cell • Uses . as packaging

  12. Vacuoles & Lysosomes • Vacuoles are used in of materials • Plant cells have vacuole while animal cells have many smaller vacuoles • Lysosomes contain enzymes that break apart cellular waste for re-use

  13. Cellular Energy Chloroplasts and Mitochondria

  14. Chloroplasts • Capture energy and produce to store • Type of plastid (storage) • Contains • Traps light energy • Green

  15. Mitochondria • for the cell • Found in plant animal cells • Double membrane • Increased surface area for reactions

  16. Support & Locomotion

  17. Cytoskeleton • Interior network of support in cells • Criss-crossed web of small “support beams”

  18. Locomotion • Short hair-like projections that move in a wave-like fashion • Long whip like “tails” • Found only in organisms

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