Endoplasmic reticulum

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Ch. 7 Tour of the Cell 2007-2008 Light Microscope - LM ? Uses visible light ? inexpensive ? live or dead objects ? Resolution: ? As magnification ?, resolution ?. ? ~1000X. ? Limitations: ? many cell structures too small Just magnified 64X Magnification & Resolution Light Microscope Variations ? Unstained ? Stained: ?Methylene blue ? iodine Light Microscope Variations ? Fluorescence: uses dyes to make parts of cells ?glow?. ? Phase-contrast: enhances contrasts in density. ? Confocal: uses lasers and special optics to focus only narrow slides of cells. Electron Microscopes ? Use beams of e- ? Invented in 1939 ? Advantages: ?Much higher mag. ? 50,000X ? Disadvantages: ? Vacuum.

Parts of A Cell

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Cell Organelle Research Websites Cells Alive http://www.cellsalive.com/cells/cell_model.htm Tour through plant and animal cell. Click on each organelle for structure and function The Virtual Cell http://www.ibiblio.org/virtualcell/tour/cell/cell.htm The Virtual Cell is an online Cell Biology textbook. It provides students with an interactive journey through the cell. Animal Cell Interactive http://www.wisc-online.com/objects/ViewObject.aspx?ID=AP11403 Explore parts of an animal cell Interactive quiz Cell Structure and Parts http://www.wiley.com/legacy/college/boyer/0470003790/animations/cell_structure/cell_structure.htm Compare Prokaryotic, Animal and Plant cell parts

A Tour of the Cell

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Ch. 7 Tour of the Cell 2007-2008 Light Microscope - LM ? Uses visible light ? inexpensive ? live or dead objects ? Resolution: ? As magnification ?, resolution ?. ? ~1000X. ? Limitations: ? many cell structures too small Just magnified 64X Magnification & Resolution Light Microscope Variations ? Unstained ? Stained: ?Methylene blue ? iodine Light Microscope Variations ? Fluorescence: uses dyes to make parts of cells ?glow?. ? Phase-contrast: enhances contrasts in density. ? Confocal: uses lasers and special optics to focus only narrow slides of cells. Electron Microscopes ? Use beams of e- ? Invented in 1939 ? Advantages: ?Much higher mag. ? 50,000X ? Disadvantages: ? Vacuum.

Parts of A Cell

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Cell Organelle Research Websites Cells Alive http://www.cellsalive.com/cells/cell_model.htm Tour through plant and animal cell. Click on each organelle for structure and function The Virtual Cell http://www.ibiblio.org/virtualcell/tour/cell/cell.htm The Virtual Cell is an online Cell Biology textbook. It provides students with an interactive journey through the cell. Animal Cell Interactive http://www.wisc-online.com/objects/ViewObject.aspx?ID=AP11403 Explore parts of an animal cell Interactive quiz Cell Structure and Parts http://www.wiley.com/legacy/college/boyer/0470003790/animations/cell_structure/cell_structure.htm Compare Prokaryotic, Animal and Plant cell parts

Tour of the cel

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Chapter 4: A Tour of the Cell Types of Cells Prokaryotic- a type of cell lacking a membrane-enclosed organelles Bacteria and Archaea DNA in the nucleoid which is not membrane-bound Eukaryotic- a type of cell with membrane bound organelles Protists, Plants, Fungi, and Animals Contian a membrane-bound nucleus Contain organelles and cytoplasm Both: Have ribosomes Plasma membrane Jelly-like cytosol Chromosomes *As the volume of a cell grows, the surface area increases proportionally because more plasma membrane needed to transfer necessary materials for the metabolic processes *Different organelles increase complexity of the cell because each organelle has a specific function, whit allows multiple activities to be going on in the cell at once The Nucleus

Bio_160_Lecture2

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cell

Vesicle

Biological membrane

mitochondrion

Cells, Membranes and Cellular Reproduction A Tour of the Cell ? Cell Structure & Function ? Chapter 4 ? Compared to the images generated by the Hubble telescope or the planetary probes like Voyager, telescope images are limited. ? Same with looking at cells under a light microscope, view is limited. ?Which of the following cell parts are visible under a light microscope? ? Cell membrane - yes. ? Large macromolecules - no. ? Microtubules - no. ? Mitochondria - maybe just barely. ? Many bacteria - yes ? The microscopic size of most cells ensures a sufficient surface area across which nutrients and wastes can move to service the cell volume ? A small cell has a greater ratio of surface area to volume than a large cell of the same shape 30 ?m 10 ?m

Cell composition cut and paste

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organelles

Cytoplasm

cell

What is a cell made up of? What to do: Label and colour in each of the cell organelles in the diagram. Cut along the dotted line and paste the cell into your workbook (plasma- membrane, cytoplasm, mitochondria, nucleus, nuclear pores, endoplasmic reticulum, golgi bodies, ribosomes, peroxisomes and lysosomes) ----------------------------------------------------------------------------------------------------------------------- -----------------------------------------------------------------------------------------------------------------------

Cell Analogy

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cell

Golgi apparatus

Technology

Name: __________________ Hr: _____ Cell Analogy Objective: Using what you have learned about cells and cell organelles create and draw an analogy of a cell. You may use any object that you want to compare with a cell and its many parts. For example: a school bus. Nucleus = driver, cytoplasm = seats, etc. Before you draw, answer these questions: What are you comparing your cell to? _____________________________________ Is your cell a plant cell or animal cell? _______________________________ 3. Define these terms: Prokaryote: Eukaryote: 4. Is your cell a prokaryote or a eukaryote? ___________________________ Fill in the following chart. You only need to choose 10 organelles to place in your analogy. Organelle Function/ Job

Cell Biology Review

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cell

Vesicle

mitochondrion

Golgi apparatus

Biological membrane