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Daily Question 3/28/2012

Daily Question 3/28/2012. Draw a cheek cell. Label the nucleus, cell membrane and cytoplasm. Please add the jobs that those organelles do. Parts of the Eukaryotic Cell. Structures are determined by function 3 main components Cell membrane Nucleus Other organelles. Organelles .

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Daily Question 3/28/2012

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  1. Daily Question 3/28/2012 Draw a cheek cell. Label the nucleus, cell membrane and cytoplasm. Please add the jobs that those organelles do.

  2. Parts of the Eukaryotic Cell • Structures are determined by function • 3 main components • Cell membrane • Nucleus • Other organelles

  3. Organelles • Tiny cell structures that carry out specific functions within the cell. • Produce energy, build and transport needed materials, and store and recycle wastes • Can you name any???

  4. Cell Membrane • Controls which substances pass in and out of the cell (selectively permeable) • Made of lipids and proteins • “Doorman”

  5. Cytoplasm • Area between cell membrane and nucleus • Contains organelles • “floor”

  6. Nucleus • Stores DNA • “Manager” • Nuclear membrane – double membrane surrounding nucleus • Nuclear pores – small holes in nuclear envelope • Nucleolus – where ribosomes are synthesized

  7. Chromatin • Are thin strands floating in the nucleus. • Contain the genetic material (DNA), or the instructions that direct the functions of the cell.

  8. Mitochondria • Site of chemical reactions • 2 membranes • Smooth outer • Inner membrane • Cristae – increase surface area • Has own DNA • “Generator/ Powerhouse”

  9. Endoplasmic Reticulum • System of membranous tubules and sacs that help molecules move from one part to another • Amount depends on cell activity • “Conveyer belt” • Rough - Have ribosomes • Smooth – Don’t have ribosomes

  10. Daily Question 4/10/12 • Draw a plant cell. Label the cell wall, cytoplasm and nucleus. • List one good thing that happened over break.

  11. Ribosomes • Not surrounded by membrane • Assembles protein • Free or Attached to ER • “Machines”

  12. Golgi Body • Processing, packaging and secreting organelles • Works with ER; modifies proteins exported by the cell • “Packaging and Shipping Plant

  13. Lysosomes • Enclose hydrolytic enzymes w/in a single membrane • Digests proteins, carbs, lipids, DNA, RNA, old organelles • “Security/Janitor”

  14. Cytoskeleton • Network of long protein threads located in cytosol • Maintains shape and size • Participates in movement • “Dropped Ceiling” • 2 types

  15. Microfilaments • Thin threads of protein (actin) • Contribute to cell movement and contraction of muscles

  16. Microtubules • Hollow tubes, largest strands of cytoskeleton • Make up spindle fibers in cell division

  17. Cilia and Flagella • Hair like organelles that extend from surface of cell • Assist in movement • Composed of nine pairs of microtubules arranged around a central pair

  18. Cell as factory

  19. Plant Cells • 2 different structures • Cell wall • Chloroplast

  20. Cell Wall • Lies outside the cell membrane • Rigid, helps support and protect plant • Contains cellulose

  21. Chloroplasts • Chloroplasts • Convert sunlight into chemical energy in the thylakoid • Green!

  22. Vacuoles • Fluid filled organelle • Stores enzymes and metabolic waste • Can be LARGE

  23. Bacterial Cells • Has a cell wall and cell membrane but DOES NOT have a nucleus. • Bacterial Cells are much smaller • No nucleus = Prokaryotic • Nucleus = Eukaryotic • EUKS have NUCS, PROS DON’T

  24. Specialized Cells • Are found in multi-cellular organisms • The structure of each kind of cell is suited to the unique function it carries out within the organism. • How is a blood cell suited for the job that it does? Nerve Cell?

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