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Cell Theory

1. 2. Cell Theory. · All know living things are made up of cells ·Cells are the basic unit of structure and function in living things ·All cells come from pre-existing cells · Clip. 3. Robert Hooke-1665. · First to see cells.

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Cell Theory

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  1. 1

  2. 2 Cell Theory ·All know living things are made up of cells ·Cells are the basic unit of structure and function in living things ·All cells come from pre-existing cells ·Clip

  3. 3 Robert Hooke-1665 ·First to see cells. ·First to use the word “cells”- named for the places that monks sleep in monastery ·Built first microscope

  4. 4 Theodor Schwann 1839 Concluded that all animals are made up of cells Matthias Schleiden 1839 Concluded that all plant cells are made up of cells

  5. 5 Two basic Types of Cells

  6. 6 Prokaryotic Cells DO HAVE ·Cell membrane ·Ribosomes ·DNA DO NOT HAVE ·Organelles ·Nucleus ·Are all singled celled organisms. ·Thought of as more ancient life forms…they came 1st!

  7. 7 Eukaryotic Cells ·Have organelles. ·Singled-celled or multicellular organisms! ·2 Types: Plant and Animal

  8. 8

  9. 9 Basic Cell Structure ·Cells come in many different shapes and sizes. ·Like bricks in a building, cells make up all living things ·Clip

  10. 10 The Cell Membrane ·The outside of ALLcells are surrounded by a membrane made ofphospholipids. ·Nickname:“The gatekeeper”

  11. 11 Membrane Structure ·There are proteins “stuck” in the membrane that help get things into and out of the cells. ·They also help to get messages into the cell.

  12. 12 The Membrane is a lipid bilayer.

  13. 13 How do molecules get into and out of a cell?

  14. 14 Transport through the membrane Two types ·Passive Transport ·Energy input NOT required ·Active Transport ·Energy input required

  15. 15 Passive Transport Moves material from High Concentration to Low concentration 3 types of Passive Transport ·Diffusion ·Osmosis ·Facilitated Diffusion Protein

  16. 16 ·Movement of molecules from a place of higher concentration to a place of lower concentration ·Always higher to lower! ·No energy input required! Diffusion

  17. 17 Osmosis:Diffusion of water through a cell membrane

  18. 18 ·Types of solutions: The direction in which the water moves is determined by the type of solution. ·Remember water runs downhill! · From high concentration to low concentration.

  19. 19 3 types of Solutions

  20. Hypertonic Or Hypotonic? What types of solution?

  21. 21 Glucose molecules High Concentration Protein channel Low Concentration Facilitated Diffusion Particles moved with the help of membrane proteins Cell Membrane bilayer

  22. 22 ·Energy is required. ·Need ATP- the universal energy molecule. ·Low to high concentration Active Transport

  23. Let's review Passive Transport! http://programs.northlandcollege.edu/biology/biology1111/animations/passive1.swf

  24. 23 Ways to get molecules into and out of a cell with active transport Some molecules are too large to get through the membrane. Website ·Endocytosis ·Into ·Exocytosis ·Out of

  25. 21 HERE Exocytosis And Endocytosis

  26. 22 Cell Structure ·Cells are composed of a variety of structures that help them do their jobs.

  27. 23 Cell Wall ·Found in Plant, Fungi, and Bacteria Cells ·Provides support and protection ·In plants, the cell wall is made of the carbohydrate cellulose.

  28. http://www.tvdsb.on.ca/westmin/science/sbi3a1/Cells/ribo.htm Ribosomes ·Not technically an organelles. ·Nickname:“protein maker” ·They help put theamino acidstogether to make proteins. ·Made of the nucleic Acid-RNA

  29. 25 The Cytoplasm ·jelly-like substance ·contains all of the organelles

  30. 26 Organelles in the Cytoplasm ·Each organelle has a specific function so that the cell can do its job. ·Each organelle has its own job! ·Remember:ONLY EUKARYOTIC CELLS HAVE ORGANELLES!!!!

  31. 27 What’s an organelle? ·Organelle mean “tiny organ.” ·Organelles function together to help the cell carry out all of life’s activities!!

  32. 28 Nucleus-The Control Center ·“The Brain” ·Contains the DNA ·DNA controls which proteins get made-and when! ·Where ribosomes are made

  33. 29 Nucleus (Continued) ·has a phospholipid bilayer around it ·nuclear pores allow substances to move into and out of the nucleus ·DNA NEVER leaves the nucleus

  34. 30

  35. 31 Endoplasmic Reticulum ·Membrane system - function = protein synthesis and transport. ·thought of as a Highway and a place of protein synthesis.

  36. 31 Two types of ER ·Smooth ·No attached ribosomes ·Rough ·Attached ribosomes

  37. Golgi Apparatus ·Nickname: “UPS” ·Packages molecules and sends them to their destination. ·Also checks to make sure the molecules are put together correctly, if not correct it sends them back to the ER. Website

  38. Let’s Review

  39. 35 Vacuoles ·packages of material that are being stored and transported ·Plants usually have one large one ·Animals generally have many small ones.

  40. 36 Lysosomes ·Nickname “Recycling Center” ·Has digestive enzymes that breakdown and recycle molecules.

  41. 37

  42. 38 Chloroplasts Site of photosynthesis in plants.

  43. 39 Cytoskeleton ·Gives cells their shape. ·Contain proteins: microtubules (shape) and microfilaments (movement). ·       

  44. 40 Mitochondria ·Nickname: “Powerhouse” ·Site of ATP production ·ATP is the universal energy molecule ·Energy is stored in the bonds of ATP. ·Website

  45. Plant cell cell wall chloroplast Golgi apparatus nucleolus rough ER ribosomes mitochondria vacuole

  46. Animal cell mitochondria rough ER microtubules microfilaments Golgi apparatus nuclear pore ribosomes centriole

  47. 43 Clip Animal Cell vs. Plant Cell

  48. 44 Levels of Organization ·Cells make up tissues. ·Tissues make up Organs. ·Organs make up organ systems.

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