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Free research essays on topics related to: cell

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  • Cell Phone Phreaking - 877 words
    Cellular Phreaking The cellular/mobile phone system is one that is perfectly set up to be exploited by phreaks with the proper knowledge and equipment. Thanks to deregulation, the regional BOC's (Bell Operating Companies) are scattered and do not communicate much with each other. Phreaks can take advantage of this by pretending to be mobile phone customers whose "home base" is a city served by a different BOC, known as a "roamer". Since it is impractical for each BOC to keep track of the customers of all the other BOC's, they will usually allow the customer to make the calls he wishes, often with a surcharge of some sort. The bill is then forwarded to the roamer's home BOC for collection. Ho ...
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  • Sickle Cell Anemia - 664 words
    What is It? How can I get It? How do I know if I have It? Can I get It from my boyfriend? If I do have It, how can I treat It? Questions, after questions, all pertaining to one subject, sickle cell anemia, a disease that has affected the lives and homes of many people. Not knowing all you can know about this disease is the 5% added to your chances of recieving it. Sickle cell anemia is an inherited blood disease which can cause bouts of pain, damage vital organs or even cause death in early childhood years. It occurs when a person inherits two sickle cell genes or a combonation of a sickle cell gene plus any one of many abnormal genes. Hemoglobin is responsible for carring oxygen from the lu ...
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  • Cell Phones Ban The Bans - 967 words
    A young girl riding in her mothers car is killed when a driver, talking on his cell phone, runs a stop sign in Chester County, Pennsylvania. Further south in a suburb of Camden, New Jersey, a driver ploughs through a group of pedestrians. An elderly couple dies as a result of his efforts to retrieve a dropped cigarette. In western Ohio, a driver causes serious injury to a father and son on their way home from a fishing expedition. The offending driver was changing stations on his radio and unknowingly drifted into oncoming traffic. These are all tragic stories of accidents that could have been avoided. All of these incidents are also covered in most states by existing careless driving laws. ...
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  • Driving With A Cell Phone - 420 words
    Many people dont know the severity of talking on a cellular phone while driving down a road full of traffic. There are so many men and women that come across peoples path while driving, who are holding up a phone stuck to their ears. The careless drivers are usually the ones one the phone which they take part of a business, and are on the phone trying t close off a sale, or just someone who is having a normal conversation where they cant wait until they get home to use the phone. Accidents are prone to happen when we see people talking on the phone crossing an intersection or switching lanes from a usy expressway. Some lose their concentration when they end up in a heated conversation. Other ...
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  • Cell Phones Why Teenageres Should Own One - 511 words
    When cellular phones and pagers first hit the market in the early '80s, customers were mainly businesses. Now, families are the fastest-growing segment of wireless customers, according to Cellular Ones homepage. Springing from this trend is the booming teenage market. The devices have become so popular, manufacturers are now making them in bright colors that appeal to younger customers. But besides the fact that cellular phones are fashionable, teenagers today have a viable reason to own a cellular phone. It is true that cell phones can be expensive. Furthermore, the teen may use the phone unnecessarily for personal reasons. But a child can develop a sense of responsibility. Parents can work ...
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  • Sickle Cell - 437 words
    Sickle Cell Anemia is a genetic disorder of the blood. This disease is very harmful causing infections, damage to organs, pain in the back, chest, and abdomen. The symptoms of this disease come at an early around six months of age, they are serious infections, pain and swelling in the hands and feet, and the heart gets larger. A defective gene that produces a weird form of hemoglobin causes Sickle Cell Anemia. Hemoglobin is a component of the red blood cells responsible for transporting oxygen from the lungs to the tissue. The hemoglobin S distorts red blood cells after they release oxygen in the tissue. These disfigure cells are called sickle cell because of the look a like to the sickle, a ...
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  • Cell Out - 1,214 words
    Sadly, I realized that because of my new "http://www.dnalounge.com/", I was finally going to need to get a cell "phones.html". I had resisted this for a very long time, because I absolutely hate the things: I think they're the rudest invention of modern times. A cell phone says that no matter where you are or what you are doing, you're at the beck and call of anyone anywhere. When someone answers a cell phone around you, they're telling you that the fact that you are face-to-face actually gives you lower priority than everyone else in the world. I don't wear a "wrists.html" watch for a similar reason: if you wear a watch, it means that your life is structured such that you frequently need to ...
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  • Cell Phones - 846 words
    Have you heard of the cell phone? A great technological advancement to many people right, or is it? Imagine you talking on a cell phone with one of you closest friends. Then your phone starts to break up, and then you are disconnected from the person you were talking to. This is only one of the many disadvantages of owning a cell phone. When owning a cell phone the most common disadvantages are the cost, the problem of unclear reception, and the accidents caused by the cell phone. Cell phones might be a great asset to people who have the money to purchase one. Unfortunately, many people are unable to purchase cell phones because of the cost of the phones, and the outrageous phone bills. Im s ...
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  • Sickle Cell Anemia - 1,920 words
    There have been many researches and tests done on the genetic causes of Sickle Cell Anemia and how it developes, as well as its effects on the circulatory, muscular, and respiratory systems, as well as its effects on the joints and other systems of the body, and the complications associated with them. Most of the research has been done to explore on the reasons why it mostly effects the African-American community and people who are from the West Coast of Africa. It has also been known that Sickle Cell Anemia also effects people from the Mediterranean countries (Wethers, 2000) Sickle Cell Anemia is a the most common single gene disorder found mostly among Black Americans (Wethers, 2000). Acco ...
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  • Stem Cell Research - 876 words
    Stem cells look to be nothing more than a hollow sphere composed of a clump of tiny, roundish balls. In reality, they are much more than that. Those 40 cells contain all the potential to become a living, breathing human being. Many scientists believe that these cells also have the potential to cure a myriad of diseases, including Alzheimer's disease, Parkinson's disease, diabetes, and many others. The cells of the four day old human embryo can be programmed to become virtually any cell in the body making them a very valuable commodity. All this sounds very promising until one realizes the cost of acquiring these miracle cells. Gathering stem cells from human embryos can be looked at as nothi ...
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  • Cell Membrane/ Electron Transport Chain / Biochemical Pathway - 655 words
    1. The cell membrane structure is vital to the life of the cell. The cell membrane is shaped as having a phosphate head at the very outer surface, and two fatty acid tails hanging from it. The membrane is double, so at the tip of the fatty acid tails, there are two more fatty acid tails attached to another phosphate head. This is what it looks like: The reason the cell membrane is shaped like this is mainly to control the water flow in and out of the cell. Water is very important to the cell: if too much water enters the cell, the cell will explode, and if too much water leaves the cell, the cell will shrivel up and die. This is how the cell membrane controls water flow: the phosphate heads ...
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  • Sickel Cell Anemia - 1,251 words
    Sickle Cell anemia is a group of inherited red blood cell disorders, or a collection of recessive genetic disorders characterized by a hemoglobin variant called Hb S. Normal red blood cells are round like doughnuts, and they move through small blood tubes in the body to deliver oxygen. Sickle red blood cells become hard, sticky and shaped like sickles used to cut wheat. When these hard and pointed red cells go through the small blood tube, they clog the flow and break apart. This can cause pain, damage and a low blood count, or anemia. There is a substance in the red cell called hemoglobin that carries oxygen inside the cell. One little change in this substance causes the hemoglobin to form ...
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  • The Cell - Spoof - 1,040 words
    Batherine Mean enters the realm of the human mind through an advanced neurological study. She is able to go inside the minds of passed-out people and talk to them while they are unconscious. What purpose this may serve is still unknown, but it sure sounds cool doesnt it? We now go to FBI headquarters to hear about their next case Chief, a new case just came in, Calls Meter Nocrack. Continue. Acknowledges Chief Wigwam. Well Sir, in Hicksville Heights they found three dolls horribly treated, their clothes were switched with those of the opposite gender dolls and Meter is cut off. There is nothing wrong with wearing the clothes of an opposite sex! states Chief Wigwam. I remember that little pha ...
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  • Sickle-cell Anemia - 295 words
    Sickle-Cell Anemia is an inherited blood disorder that affects millions of people around the world. It is particularly common among people whose ancestors come from sub-Sahara Africa and Spanish speaking regions. Approximately 2 million Americans carry the sickle cell trait. Sickle-Cell Anemia is caused by an error in the gene that tells the body how to make hemoglobin. The defective gene tells the body to make the abnormal hemoglobin that results in deformed red blood cells. The presence of two sickle-cell genes is necessary for a child to have the disease. Which means there is about a 25% chance for a child to have the disease if both of his parents are carriers. A few of the symptoms caus ...
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  • Abnormal Cell Growth Leading To Cancer - 1,599 words
    Cancer is the second leading cause of death in the United States. Half of all men and one-third of all women in the U.S. will develop cancer during their lifetimes. Although it is common knowledge that cancer is generally inherited, this paper will further explore the causes and what happens on a cellular level when cancer develops in the human body. Basics of signal transduction Cell communication, or signal transduction, is simply the means by which cells in the body respond to signals coming from outside those cells. The purpose of this chemical communication is to coordinate functions inside the cell, between cells or between organs in the body, allowing us the means to respond to our ex ...
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  • Methamphetamine Abuse Linked To Brain Cell Damage - 459 words
    BETHESDA, MD -- March 28, 2000 -- New research shows that those who use methamphetamine, often called "meth" or "speed," risk long-term damage to their brain cells similar to that caused by strokes or Alzheimer's disease. In an article published in the March 28 issue of Neurology, scientists at the Harbor-UCLA Medical Center in Torrance, California, used magnetic resonance spectroscopy to take measurements of three parts of the brains of 26 participants who had used methamphetamine and then compared them with measurements of the same regions in the brains of 24 people who had no history of drug abuse. "While the meth users in this study hadn't used the drug for some time--anywhere from two w ...
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  • Therapeutic Cloning And Stem Cell Therapy In Relation To The South Korean Breakthrough Of February 2004 - 660 words
    Introduction Politicians, philosophers, lawyers and scientists have been arguing about it for years, but most recent headlines have reignited the simmering debate about therapeutic cloning. Having sent ripples through the scientific and political communities, this issue presents at once radical advantages to medical evolution, and highly controversial moral issues. It seems that the new prospect - using cloned human embryos for medical therapy - will take some time before breaking political and moral barriers to become an accessible reality. What are stem cells? Uses? The exclusive particularity of stem cells, is the aspect attracting scientists to put them to many uses for sufferers. Stem c ...
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  • Methamphetamine Abuse Linked To Brain Cell Damage - 459 words
    BETHESDA, MD -- March 28, 2000 -- New research shows that those who use methamphetamine, often called "meth" or "speed," risk long-term damage to their brain cells similar to that caused by strokes or Alzheimer's disease. In an article published in the March 28 issue of Neurology, scientists at the Harbor-UCLA Medical Center in Torrance, California, used magnetic resonance spectroscopy to take measurements of three parts of the brains of 26 participants who had used methamphetamine and then compared them with measurements of the same regions in the brains of 24 people who had no history of drug abuse. "While the meth users in this study hadn't used the drug for some time--anywhere from two w ...
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  • Biological Inspection Of Cell Membranes - 775 words
    The plasma membrane is the boundary of life; this selectively permeable membrane allows the cell to maintain a unique internal environment and to control the movement of materials into and out of the cell. The phospholipid bilayer (fluid mosiac model) with specific membrane proteins accounts for he selective permeability of the membrane and passive and active transport mechanisms. Membrane phospholipids are amphipathic. Cell membranes are phospholipid bilayers with the hydrophobic hydrocarbon tails in the center and the hydrophilic heads facing the aqueous solution on both sides of the membrane. The phospholipid bilayer also called the fluid mosiac model has proteins embedded in the phosphol ...
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  • Lab Report On Cell Biology - 328 words
    I made my cell project by myself. It took me 1 day to build it. I made the Mitochondria out of a dark blue glass squiggle, I made the Vacuole out of a light blue glass squiggle, I made the Golgi Complex out of a dark red string of yarn, and the Lysosomes were made out of a light blue pebble. I made the Endoplasmic Reticulum out of bubble tape, the Ribosomes were made from purple marker marks on the bubble tape, the Cytoplasm was made out of Styrofoam, and the Nucleus, Nucleolus, and Nuclear Membrane out of soft clay. The Endoplasmic Reticulum breaks down drugs and certain other chemicals that could harm the cell; it can also move substances from one place to another. ATP is produced in the M ...
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