SCIENCE CELL – STRUCTURE AND FUNCTIONS Cell – Structure and Functions Cell as the Basic Unit of Life The cell is the basic structural and functional unit of all living organisms. It is the smallest part of the body of an organism‚ is capable of independent existence and is able to perform the essential functions of life. Discovery of the Cell Robert Hooke observed cork cells under a simple microscope designed by him. He observed compartments resembling honeycombs and each compartment
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Cell Membrane Structure Phospholipids are arranged in to layers‚ called the bilayer. They only have 2 fatty acids‚ this is because the third fatty acid is replaced by a negatively charged phosphate group. The phosphate heads are polar‚ in other words attracted to water‚ therefore they are hydrophilic. The lipid tails are non-popular as they’re not attracted to water and therefore known as hydrophobic. When phospholipids are added to the water‚ they rearrange themselves so that the hydrophilic heads
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http://www.wadsworth.org/chemheme/heme/microscope/lymphocytes.htm Vesicular Nuclei: euchromatin predominates; indicates high metabolic rate/active cell [DNA is extended = ready to be read] [purple areas = ribo of rER] http://www.vetmed.vt.edu/education/curriculum/vm8304/lab_companion/histo-path/vm8054/labs/Lab3/Examples/exvesnuc.htm [tumor cell with vesicular nucleus] http://archive.ispub.com/journal/the-internet-journal-of-laboratory-medicine/volume-4-number-2/bizarre-leiomyoma-a-close-
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Describe the key structures and functions of a eukaryotic and prokaryotic cell. Eukaryotic Cell (1) There are many organelles in the eukaryotic cell micrograph above. Some of these organelles are displayed in the prokaryotic micrograph and so‚ I have described the shared organelles in the prokaryotic micrograph section. Mitochondria The mitochondria cells break down nutrients which then creates energy. They act like a digestive system. This process is called cellular respiration. The
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Comparing Cell Theory Parts to real world applications Cell Membrane compared to a house- Cellmembrane = screen on porch or window‚ lysosome is garbage disposal or recycling bin‚ vacuole is a water storage tank‚ er are hallways‚ mitochondria is a furnace or electrical generator‚ ribosomes could be the kitchen oven that’s making dinner‚ the nucleus is the parent Lysome- Cell Wall- probably be like a city wall surrounding the city‚ protecting it and defining the boundaries (osmotic control‚ protection
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Robert Hooke first looked at a thin slice of cork in 1665; he saw "a lot of little boxes." These little boxes first reminded of the little rooms monks lived in‚ so he called them cells. Hooke observed the same pattern in the stems and roots of carrots and other plants. What Hooke still did not know‚ however‚ was that cells are the basic units of living things. Ten years later‚ the Dutch scientist Anton van Leeuwenhoek focused a microscope on what seemed to be clear pond water and discovered a wondrous
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Cells are the basic functional units of all organisms. Cells are the smallest unit of life and are often called the "building blocks of life". The distinction between prokaryotes and eukaryotes is considered to be the most important variation among groups of organisms. Eukaryotic cells contain membrane-bound organelles‚ such as the nucleus‚ while prokaryotic cells do not. The differences in cellular structure of prokaryotes and eukaryotes include the presence of mitochondria and chloroplasts‚ the
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TECHNOLOGY STRATEGY ANALYSIS Introduction Ceramic Fuel Cells Ltd.‚ established in 1992‚ is world leader in commercialization of Solid Oxide Fuel Cell (SOFC) technology which is used to generate efficient‚ low-emission electricity from widely available natural gas and renewable fuels. It develops‚ manufacture‚ and market SOFC products for small-scale‚ micro-Combined Heat & Power (micro-CHP) and distributed generation applications that co-generate electricity and heat for homes and businesses
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Eukaryotic vs. Prokaryotic cells Prompt: Describe the similarities and differences between Prokaryotic and Eukaryotic cells. All organisms are made of cells. The cell is the simplest collection of matter that can be alive. Cells are the basic structural and functional units of every organism. Cells fall into two distinct types: Prokaryotic and Eukaryotic. While Prokaryotic and Eukaryotic cells are similar in that both types of cells are bounded by a plasma membrane‚ all contain cytosol‚ and all
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with natural human life‚ stem cell research is helpful and effective due to the various diseases it has the potential to cure and the reduced risk of transplantation after surgery. Stem cells are versatile cells that have potential to develop into specific cells. Everyone has stem cells‚ however‚ they are much more dominant in a fetus than in an adult body. Stem cells have potential to create all specific cells in the body and repair or replace damaged cells. Stem cell research is important in society
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