1 / 31

Chapter 3 The Cell

Chapter 3 The Cell. 3.1. Our understanding of the cell grew as microscope quality improved. Cell Theory. Mainly Schleiden , Schwann, Virchow All organisms are made of cells All existing cells are produced by other cells The cell is the most basic unit of life. General Cell Characteristics.

cutler
Télécharger la présentation

Chapter 3 The Cell

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 3The Cell

  2. 3.1 • Our understanding of the cell grew as microscope quality improved.

  3. Cell Theory • Mainly Schleiden, Schwann, Virchow • All organisms are made of cells • All existing cells are produced by other cells • The cell is the most basic unit of life.

  4. General Cell Characteristics • Tend to be microscopic • Enclosed in a membrane • Filled with cytoplasm

  5. Types of cells • Prokaryotic • No nucleus • No membrane bound organelles • Like bacteria • Eukaryotic • Nucleus • Membrane bound organelles • Like not bacteria

  6. 3.2 • Cells have an internal structure

  7. Cytoskeleton • Support and shape • Position and transport organelles • Strength • Assists in cell division • Cell movement

  8. Nucleus • Stores genetic information • Control center of the cell

  9. Endoplasmic Reticulum • Transport • Rough: has ribosomes for processing proteins • Smooth: no ribosomes, process lipids and carbohydrates

  10. Ribosomes • Made of rRNA • Form proteins

  11. Golgi apparatus • Golgi bodies • Packaging and shipping

  12. Vesicles • Membrane bound sacks • Storage

  13. Mitochondria • Energy

  14. Vacuoles • Like little warehouses • Storage

  15. Lysosomes • Waste disposal • Digest material

  16. Centrioles • Tubes in centrosomes • Help in mitosis • Form cilia and flagella

  17. Plant cell parts • Chloroplasts: where photosynthesis occurs • Have a cell wall of cellulose for support

  18. 3.3 • Cell membrane

  19. Functions • Enclose cell like a fence does • Controls passage of stuff like a fence does

  20. Structure • Phospholipidbilayer • Proteins, carbohydrates, and lipids may be imbedded in the membrane • The fluid mosaic model

  21. Selectively permeable • Lets some stuff in, keeps other stuff out. Kinda like a fence does

  22. Receptors • A substance can bind to its receptor • Causes an action on the other side of the membrane

  23. 3.4 • Stuff can move across cell membranes

  24. Transport • Passive: just happens • Active: requires energy

  25. Passive transport • Diffusion: stuff diffuses from regions of high concentration to regions of low concentration • Osmosis: diffusion of water

  26. Three types of solutions • Hypotonic: • Lower concentration • Water moves out of cell • Hypertonic • Higher concentration • Water moves out of cell • Isotonic • Same concentration • No net movement of water

  27. Examples

  28. Facilitated diffusion • Some molecules can only diffuse through transport proteins. • Facilitated diffusion is diffusion through transport proteins. • Revolving door

  29. 3.5 • Some transport requires energy

  30. Active transport • Requires energy • Goes against a gradient

  31. Types • Pumps • Endocytosis: takes material into the cell • Pinocytosis: cell drinking • Phagocytosis: cell eating • Exocytosis: expels material from the cell

More Related