1 / 35

Chapter 7

Chapter 7. A Tour of the Cell. cells – basic units of structure/function microscopy – light microscope (LM) electron microscope (TEM, SEM) -resolving power -Leeuwenhoek (1600’s) -Robert Hooke (1665) -cell fractionation - centrifuge.

geoffrey-kristian
Download Presentation

Chapter 7

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Chapter 7 A Tour of the Cell

  2. cells – basic units of structure/function microscopy – light microscope (LM) electron microscope (TEM, SEM) -resolving power -Leeuwenhoek (1600’s) -Robert Hooke (1665) -cell fractionation - centrifuge

  3. Figure 7.1 The size range of cells

  4. Prokaryotic vs. Eukaryotic cells (largest distinction) • Cytoplasm/cytosol • Cell size limitations plasma membrane – thin, transparent, phospholipid bilayer, flexible, selectively permeable, porous

  5. Structures found in all cells • Cytosol • Plasma membrane • Ribosomes • DNA (chromatin/chromosomes)

  6. Organization – Ultrastructure:Nucleus ~ 5mm diameter nuclear envelope: pore complex chromosomes/chromatin nucleolus: nucleolar organizers

  7. Figure 7.4 A prokaryotic cell

  8. Figure 7.5 Geometric relationships explain why most cells are microscopic

  9. Figure 7.6 The plasma membrane

  10. Figure 7.9 The nucleus and its envelope 

  11. Ribosomes free bound Endomembrane system endoplasmic reticulum (ER) cisternae rough smooth

  12. Figure 7.11 Endoplasmic reticulum (ER)

  13. Figure 7.10 Ribosomes

  14. Golgi apparatus dictyosome Lysosome Microbodies peroxisomes – produce H2O2 glyoxysomes – initiate conversion of fat to sugar Vacuole Mitochondrion

  15. Figure 7.12 The Golgi apparatus

  16. Figure 7.16 Review: relationships among organelles of the endomembrane system 

  17. Figure 7.14 The formation and functions of lysosomes (Layer 3)

  18. Figure 7.13 Lysosomes

  19. Figure 7.19 Peroxisomes

  20. Figure 7.15 The plant cell vacuole 

  21. Figure 7.17 The mitochondrion, site of cellular respiration

  22. Plastids chloroplasts amyloplasts chromoplasts: xanthophyll – yellow carotene – orange phycoerythrin – red

  23. Figure 7.18 The chloroplast, site of photosynthesis

  24. Cytoskeleton microtubules microfilaments intermediate filaments Centrioles Cilia Flagella (eukaryotic 9+2) Pseudopodia

  25. Table 7.2 The structure and function of the cytoskeleton

  26. Figure 7.20 The cytoskeleton

  27. Figure 7.22 Centrosome containing a pair of centrioles

  28. Figure 7.23 A comparison of the beating of flagella and cilia

  29. Cell wall primary middle lamella secondary plasmodesma (plants) ECM (extracellular matrix)

  30. Figure 7.28 Plant cell walls

  31. Figure 7.29 Extracellular matrix (ECM) of an animal cell

  32. Intercellular junctions • Tight junctions – continuous belts fused to prevent leakage ex: intestinal epithelium 2) Desmosomes – anchoring junctions ex: epithelial sheets • Gap junctions – communicating junctions ex: in heart muscle cells

  33. Figure 7.30 Intercellular junctions in animal tissues

  34. Figure 7.8 Overview of a plant cell

  35. Figure 7.7 Overview of an animal cell

More Related