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    Cell Theory

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    background knowledge relating to the current cell theory‚ the differences between prokaryotes and eukaryotes‚ and the structures and functions found within cells. Once this knowledge is known‚ a person is then able to give their opinion in the debate. In the 1800s‚ the cell theory was developed. This theory states that cells are found in all living things making them the basic units of life and that all cells come from other cells. In order to be classified as a cell‚ the object in question must be able

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    Cell Phones

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    Do you have a cell phone? Well‚ to the many who do‚ it is a way of communication in a car. Cell phones have been known to distract the driver from concentrating on the road. But is it really worth banning? A majority of the nation agrees to ban cell phones in the use by the driver. Our nation is based on a democracy and if the people want cell phones banned‚ it should be outlawed. The majority of the nation agrees that cell phones are a distraction on the road. I‚ as a driver‚ too‚ think

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    a) Using a human cell of your choice‚ describe how organelles work together to make and secrete a protein (LO1. AC 1.1) An epithelial cell in the thyroid gland‚ called a thyrocyte forms spherical follicles that produce a protein called thyroglobulin. This is a globular protein that has a functional role in metabolism. The protein is used by the thyroid gland to produce thyroid hormones; thyroxine (T4) is an example of one of the hormones created. Thyroxine is formed by iodine binding to tyrosine

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    Cell Injury

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    CELL INJURY: CAUSES OF CELL INJURY‚ MECHANISMS OF REVERSIBLE AND IRREVERSIBLE CELL INJURY. CELL INJURY. Causes of cell injury range from gross mechanical external causes to mild endogenous causes as genetic lack of enzymes etc. Virtually all forms of tissue injuries start with molecular or structural alterations in cells. Under normal conditions‚ the cells are in: ❖ homeostastatic „steady“ state Normal cell is confined to relatively narrow range of functions and structure by

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    CELLS LEC

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    Cell Structure and Function Chapter Outline  Cell theory  Properties common to all cellsCell size and shape – why are cells so small?   Prokaryotic cells Eukaryotic cells    Organelles and structure in all eukaryotic cell Organelles in plant cells but not animal Cell junctions History of Cell Theory  mid 1600s – Anton van Leeuwenhoek  Improved microscope‚ observed many living cells  mid 1600s – Robert Hooke  Observed many cells including cork cells  1850 – Rudolf Virchow

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    Cell biology

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    Questions of this chapter: **Definition Cell cycle 2. Homologous Chromosome 3. Sister Chromatid 4. Synapsis **Short Questions 1.Describe the chief events of mitosis and show how these differ from meiosis. (V.V.I.) 2. What ‘checkpoints’ occur in cell cycle? What is the role of each? **Long Questions 1.Describe the phases of the cell cycle and the events that characterize each phase. Answer of short Definition is given below 1. Cell Cycle: The cell cycle is an orderly sequence of events

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    Specialized Cell

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    SPECIALIZED CELL ANIMAL Sperm cells PLANT Xylem cells are specialised to find a female cell (egg cells) and join with it. They have tails‚ that makes them move in water to find and fertilize the female cell. They can move because they have many mitochondria located between the tail and the head‚ which gives them energy. In the head‚ there is a vacuole filled with acrosome‚ which is a specialized Lysosome that releases enzymes in order for the Sperm Cell to break into the Egg Cell‚ through the

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    though a cell is the basic unit of an organism it can be pretty complex inside of one. So why don’t we try and make it a little simpler by comparing it to something we’re all more comfortable with? Take Disneyland for example! Everyone is familiar with Disneyland and how it works. Let’s see just how similar these two can be. First‚ would be the entrance gate. The entrance gate could be our cytoplasm. Cytoplasm is the jelly-like fluid that fills a cell and inside is all the other cell organelles

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    Cell Injury

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    Cell injury In this topic we are going to cover Cell injury Causes of cell injury Mechanism of cell injury Morphologic alterations in cell injury Morphologic types of necrosis Objectives Describe cell injury List the causes of cell injury Discuss how depletion of ATP causes cell injury Describe how mitochondrial damage cause cell injury Explain the mechanism of cell injury by free radicals Discuss how calcium ion influx cause cell injury Cell injury cell injury results when cells

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    War there had been several attempts to abolish trade barriers between European countries‚ however the main focus at this time was individual national development. After WW1 and throughout the inter-war period‚ nations attempted to rebuild their economies though a significant increase in protectionism‚ which resulted in a huge increase in unemployment‚ and led to the Great Depression. Following the Second World War the European Economies were focused on rebuilding both their social and economic state

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